This article contains affiliate links. If you purchase an item through one of these links, we receive a small commission that helps fund our Recycling Directory.

1. Invest in Reliable Equipment

• The core hardware list hasn’t changed much — but what’s available at each price point has improved considerably.

  Aquarium or tank. A 100-gallon tank remains the recommended starting point for a serious home system. It gives you flexibility in fish species, plant density, and system stability. Acrylic tanks are lighter and optically clearer; glass tanks are heavier but scratch-resistant. Expect to pay $300–$600 for a quality 100-gallon tank. Search current options on Amazon.

  If you’re new to aquaponics, the AquaSprouts Garden Kit is a well-reviewed all-in-one beginner system that fits a standard 10-gallon aquarium. It includes a grow bed, submersible pump, mechanical timer, and light bar mounting system, and costs $75–$90. The aquarium itself is sold separately.

  Canister filter. For a 100-gallon aquaponics tank, target 500–600 gallons per hour (GPH) of water turnover, well above what the tank volume alone would suggest, because the fish load demands high filtration. The Fluval FX2 (~$269 on Amazon) is consistently top-rated for tanks up to 100 gallons, featuring 4-stage filtration, Smart Pump technology that auto-adjusts flow, and a built-in water change system. A solid budget alternative is the Penn-Plax Cascade 1000 (~$199 on Amazon), which handles up to 100 gallons, recirculating the water more than twice an hour.

  Air pump. Dissolved oxygen is critical for fish health and for the beneficial bacteria driving nitrification. A quality air pump — or a canister filter with an integrated spray bar — will keep oxygen levels stable. A 2025 review in Reviews in Aquaculture found that micro-nano bubble (MNB) aeration increased butterhead lettuce yield by 35% compared to conventional diffusers, and raised nitrate concentration in the water. MNB systems are commercially available but not yet mainstream for home setups, so a conventional air pump remains the practical choice for most beginners.

  Grow lights (optional, system-dependent). Indoor systems need supplemental lighting. Full-spectrum LED grow lights have dropped substantially in price and energy draw. Look for LED bars with daylight-spectrum output (5000–6500K) sized to your grow bed. Search LED grow lights on Amazon.

  Water heater (optional). Tilapia require 70–85°F. If your space runs cooler, a submersible aquarium heater is essential. Search aquarium heaters on Amazon.

2. Choose Your Setup

Three system types work at home scale. The choice depends on available space, target crops, and tolerance for complexity.

Media bed are recommended for beginners. Plants grow in a bed of inert media, such as expanded clay pebbles, gravel, or lava rock, positioned above or beside the fish tank. A pump floods the bed periodically, then drains back. The media supports roots and houses beneficial bacteria. Research from Texas A&M confirmed media beds are the most forgiving system for beginners and support the widest range of crops, including fruiting vegetables like tomatoes and cucumbers. The Oklahoma Cooperative Extension Service provides detailed DIY build plans.

A 2025 study found that carbonized rice husks and cocopeat as grow media can yield five times more crop than traditional expanded clay aggregate (LECA), though they decompose over time and require more frequent replacement.

Nutrient film technique (NFT). A thin stream of water flows continuously through PVC tubes past plant roots dangling inside. Excellent for herbs, lettuce, and small greens in tight or vertical spaces; the tubes can be wall-mounted. Vertical aquaponics setups can increase productivity per unit area by up to 160% compared to horizontal systems, based on research with strawberries and basil. NFT kits are available on Amazon for both DIY and complete systems.

Raft (deep water culture). Plants float on foam rafts with roots submerged directly in nutrient-rich water drawn from the fish tank. They produce a higher yield than NFT for leafy greens, but requires more robust filtration because solids aren’t removed by a media bed. More common in semi-commercial operations than small home setups. Check options on Amazon.

A growing range of IoT sensors let you track pH, dissolved oxygen, ammonia, and temperature continuously from your phone. WiFi pH/EC meters designed for hydroponic and aquaponic systems are now in the $60–$120 range. For beginners, manual weekly testing is fine. For anyone running a system unattended or scaling up, continuous monitoring significantly reduces the risk of a water quality crash.

3. Add the Fish

An aquaponics system will support many species of fish. Several of the most popular options are:

• Tilapia: The most common aquaponics fish for good reason. Tilapia tolerate temperature swings, pH variation, and elevated ammonia better than most species. They grow quickly (typical harvest: 6–8 months), are inexpensive to stock, and provide a dual harvest of vegetables and protein. Best for warm indoor or greenhouse systems (70–85°F).
• Koi: Popular ornamental choice. Koi tolerate poor water quality and are hardy once established, but they’re susceptible to a range of pathogens and aren’t typically harvested for food. Well-suited to media bed systems where water quality is easier to maintain.
• Bluegill, perch, and catfish. Solid edible alternatives to tilapia in cooler climates where tilapia’s warmth requirements are a challenge. Texas A&M’s fish species selection guide covers temperature ranges, feed conversion ratios, and disease susceptibility for home-scale species in detail.

These are great options, but you can also consider carp, perch, largemouth bass, bluegills, guppies, and more. Purchase fish from a reputable aquaculture supplier or local fish hatchery when possible — disease-carrying fish is one of the fastest ways to crash a new system. Pet store fish are not certified disease-free.

4. Add the Plants

Like fish, the options are endless when deciding which vegetables to grow in your aquaponics system. Some popular options include broccoli, celery, cucumbers, and basil.

But because different plants require different conditions, you’ll want to select plants that will thrive in your setup. As Go Green Aquaponics explains, it is important to consider the following:

1. System: What type of aquaponics system you will use – plants with no root structure do well in a raft setup, while root vegetables do well in a media bed.
2. The optimal temperature and pH level for your fish and your plants – the closer the match, the more successful you’ll be.
3. Environment: the amount of light, temperature and – if you’re setting up your system outside – rain the plants will get.
4. How much space you have for plants versus how much space the plants need to grow.
5. Plant-to-fish ratio: The more fish you plan on having, the more plants you need to absorb the nutrients.

5. Maintain Your System

Keeping healthy plants and fish will require regular maintenance. Some tips include:

• Feed your fish two to three times daily in small amounts. Overfeeding is the most common cause of ammonia spikes in home systems. Uneaten food decomposes rapidly and overwhelms the beneficial bacteria that keep the system in balance.

  Test pH weekly. Target range is 6.4–7.4, with most systems running best around 6.8–7.0. The API Freshwater Master Test Kit (~$35 on Amazon) tests pH, ammonia, nitrite, and nitrate in one kit — the standard recommendation for aquaponics monitoring. For more serious systems, the LaMotte Aquaponics Water Test Kit (~$85 on Amazon) covers nine parameters including dissolved oxygen and carbon dioxide, and comes with a rugged carrying case. To raise pH naturally, dissolve a tablespoon of food-grade potassium carbonate (potash) in a bucket of system water, add it slowly to the tank, and retest after 24 hours before adding more.

  Test ammonia and nitrate weekly or biweekly. Ammonia should be below 2 ppm; nitrates should stay under 160 ppm. Elevated ammonia: feed less, increase aeration, or reduce fish density. High nitrates: add more plants or remove some fish.

  Mind the cycling period. A new system takes 4–6 weeks to fully cycle and for the bacterial colony to establish and nitrogen conversion to stabilize. Don’t increase fish load or plant density during this period. Ammonia and nitrite readings near zero consistently is your green light.

The following video from Rob Bob’s Aquaponics provides guidance on how to check the pH, ammonia levels, and nitrate levels.

Get Some Fish In Your Garden

Aquaponics is an easy and environmentally conscious way to grow produce and raise fish at the same time. It can be used to grow all your favorite leafy greens, and there are endless varieties of fish that will adapt well to this system. Just keep up with regular maintenance and aquaponics will prove to be a viable and sustainable new way to garden.

The science of aquaponics is advancing quickly. Three developments from recent peer-reviewed literature are worth knowing about, even if most aren’t yet practical for home systems:

Algae co-cultivation. Reviews in Aquaculture reports that introducing macroalgae such as Spirogyra spp. can nearly double plant yields compared to traditional aquaponic systems. Co-cultivating microalgae (Chlorella) with plants in raft systems also controls ammonia at twice the efficacy of non-algal systems. This is emerging research — not yet mainstream for home growers — but a promising direction for anyone looking to push yields further.

Decoupled system design. Research from the Journal of the World Aquaculture Society (2024) documents that decoupled systems, which separate the aquaculture unit from the hydroponic unit, allow optimized conditions in each component, resulting in better nutrient utilization and increased productivity compared to coupled designs. Decoupled systems allow independent pH management for fish and plants, which is otherwise a constant compromise in standard coupled setups. Commercially available decoupled systems are beginning to become available; for DIY builders, it’s a worthwhile design consideration when scaling up.

AI and IoT integration. A 2025 Sustainable Environment Research review emphasizes that monitoring strategies using artificial intelligence, the Internet of Things, and renewable energy can significantly enhance aquaponic system efficiency. For home growers, this means the WiFi monitoring systems mentioned in Step 2 are part of a broader wave of automation coming to small-scale aquaponics. The good news: prices will continue to drop.

Editor’s Note: This article was originally published on March 17, 2021, and updated in April 2026. Feature image of outdoor aquaponics system courtesy of Vasch~nlwiki, CC BY-SA 4.0, via Wikimedia Commons

About the Author

David Thomas is founder and editor-in-chief of Everything Fishkeeping, a fishkeeping and aquascaping magazine. He has been keeping fish since he was a child and has kept over 12 different setups. His favorite is his freshwater tank with Tetras and Loaches.

The post How To Grow Vegetables With Aquaponics appeared first on Earth911.

https://earth911.com/home-garden/grow-vegetables-with-aquaponics/

Subscribe to receive transcripts by email. Read along with this episode.

What if the solution to the retail industry’s $890 billion returns crisis wasn’t better logistics, but better logic? Disney Petit, founder and CEO of Liquidonate, is proving that the most sustainable return skips the trip back to a warehouse and goes directly to a community in need. Americans returned nearly 17% of all retail purchases last year, generating 2.6 million tons of landfill waste and 16 million tons of CO2 emissions. Each return costs retailers between $25 and $35 to process, yet 52% of consumers admit to participating in return fraud at least once. Petit witnessed this broken system firsthand as employee number 15 at Postmates, where she built the customer service team and created Civic Labs, the company’s social responsibility arm. Her food security product Bento, which allowed people without smartphones to access free food via text message, won Time Magazine’s 2021 Invention of the Year Award. Now Liquidonate has earned recognition as one of Time’s Best Inventions of 2025.

Liquidonate integrates directly with retailers’ existing warehouse and return management systems. When a product comes back and can’t be resold—open box, slightly damaged, or simply unwanted—the platform automatically matches it with a local nonprofit or school that needs it. “It’s the same reverse logistics workflow they already use,” Petit explains. “It’s just redirected toward community good instead of going to the landfill.” The platform handles everything: shipping labels, pickup coordination, and tax documentation so retailers can write off donations. Retailers recover logistics costs through tax benefits while communities receive quality products, and millions of pounds of goods stay out of landfills.

To date, retailers using Liquidonate have diverted over 12 million items from landfills, working with more than 4,000 nonprofits across the country. Liquidonate also tackles return fraud by eliminating “keep it” returns, when customers claim they want to return something but are told to keep the item and still receive a refund. “One hundred percent of the time we’re producing a shipping label for a nonprofit who wants that product,” Petit says. “We completely eliminate that keep-it return option, so we eliminate the returns fraud option.” With $900 billion worth of inventory potentially available for redirection, Petit approaches the business through the lens of environmental justice, building a for-profit company designed to prove that doing good and doing well aren’t mutually exclusive—they’re interdependent.

Nonprofits and schools can sign up for free at liquidonate.com. Retailers interested in partnering can reach out to partners@liquidonate.com.

• Subscribe to Sustainability In Your Ear on iTunes
• Follow Sustainability In Your Ear on Spreaker, iHeartRadio, or YouTube

Editor’s Note: This episode originally aired on November 17, 2025.

The post Best of Sustainability In Your Ear: Liquidonate CEO Disney Petit On Solving The Retail Returns Crisis appeared first on Earth911.

https://earth911.com/podcast/sustainability-in-your-ear-liquidonate-ceo-disney-petit-on-solving-the-retail-returns-crisis/

We would all like to buy the most environmentally friendly appliances available. But in real life, energy efficiency is only one of many factors we need to consider when we’re making major purchases. If you’re dealing with a narrow galley kitchen, living in a tiny house, or dealing with any number of awkward kitchen configurations, the dimensions of your new refrigerator might be your top priority. Fortunately, if a counter-depth refrigerator is non-negotiable, there are extremely efficient options.

The refrigerators in the original 2021 version of this guide are either discontinued, superseded, or now five years into an appliance lifecycle that averages 10–14 years. A lot has changed — and not just the model numbers.

Counter-depth refrigerators have closed much of the capacity gap with standard-depth models. In 2024, LG and Samsung introduced counter-depth models reaching 26.5–27 cubic feet, nearly matching standard-depth capacity without jutting past your cabinets.

Even better, refrigerant reform is also essentially complete: R-600a, which has a global warming potential 500 times lower than previous refrigerants, is now the industry standard across virtually all new household refrigerators sold in the U.S. You no longer need to check the door sticker for refrigerant type — it’s almost certainly R-600a. One new nuance: R-600a is flammable. This doesn’t create meaningful safety risk in normal use, but it does mean sealed-system repairs must be performed by a technician with hydrocarbon-rated recovery equipment. Ask before scheduling service.

This article contains affiliate links. If you purchase an item through one of these links, we receive a small commission that helps fund our Recycling Directory.

How to Choose a Counter-Depth Refrigerator

Counter-depth isn’t a single spec, it’s a range. True counter-depth refrigerators, which are 24- to 25-inches deep, offer a counter-flush look but are relatively rare. Most models marketed as counter-depth run 27–30 inches deep are still meaningfully shallower than standard-depth units, which range from 32 to 36 inches. Be sure to measure your space carefully before shopping.

1. Fit first. Measure the opening width, depth (including door swing clearance and handle protrusion), and height. Leave at least 1 inch on each side and top for ventilation. Note any door swing obstructions, such as islands, adjacent cabinets, dishwasher handles.
2. Right-size for your household. The commonly cited rule is that each person needs 4 to 6 cubic feet of total capacity. A household of two can usually work with 16–20 cubic foot fridge; three to four people generally need 20–26 cubic feet. Don’t oversize, as a mostly empty refrigerator is less efficient than one that’s three-quarters full.
3. Freezer configuration. Top-freezer models remain the most energy-efficient configuration per cubic foot. Bottom-freezer designs put fresh food at eye level but add mechanical complexity. French-door models are most popular and offer the widest variety but use more energy and generate more service calls than simpler designs.
4. Energy consumption, not just certification. Energy Star certification means a model uses at least 10% less energy than the federal minimum. That’s a floor, not a ceiling. Check the yellow EnergyGuide label on the appliance for estimated annual kWh; typically the difference between the best and worst Energy Star-certified counter-depth models can be 200+ kWh per year, a $20–$40 annual gap at annual utility rates.
5. Refrigerant. As of 2025, R-600a is effectively universal in new U.S. refrigerators. Verify on the data plate inside the fresh-food compartment.
6. Features that raise energy use. Through-door ice and water dispensers, in-door ice makers, anti-sweat heaters, and smart screens all increase electricity consumption. If you don’t need them, the most efficient models skip them. Internal water dispensers are a reasonable middle ground that provide convenience without an exterior mechanism that uses electricity.
7. Reliability data. French-door models with ice makers generate significantly more service calls than simpler designs. Yale Appliance’s 2026 service data, based on 33,190 service calls, ranks LG and GE as the most reliable counter-depth French-door brands, with Bosch leading on temperature stability. Consumer Reports members can find long-term predicted reliability rankings by brand at consumerreports.org, where GE brands and Bosch consistently rank near the top for long-term predicted reliability.
8. Service access. A reliable brand is only as good as the technicians who can fix it. GE has the broadest national service network. Bosch and LG are well-supported in most metros. Samsung has historically had longer repair wait times, a real consideration for a decade-long appliance relationship.
9. Don’t forget disposal. When your old refrigerator goes, the R-600a refrigerant must be recovered by a certified technician before recycling. Use Earth911’s recycling search to find appliance recyclers near you, and confirm that they are an EPA Responsible Appliance Disposal (RAD) partner to ensure proper refrigerant handling.

The Best Counter-Depth Refrigerators in 2026

The original article featured models from 2021, most of which are discontinued. Here are current alternatives organized by configuration, prioritizing Energy Star certification, current availability, and documented reliability.

Best for Energy Efficiency: Frigidaire FFTR1835VW (Top Freezer)

Top-freezer models remain the most efficient configuration available. The Frigidaire FFTR1835VW is an 18.3 cu. ft. Energy Star–certified top-freezer with a 30-inch depth, which is significantly shallower than standard models. It uses approximately 369 kWh/year, forgoes energy-intensive features like an ice maker and through-door dispenser, and includes humidity-controlled crisper drawers and an auto-defrost function. It’s also garage-ready (tested from 38°F to 110°F) and ADA compliant. No smart features, no ice maker; just efficient, reliable cold storage.

Depth: 30 in. | Capacity: 18.3 cu. ft. | Est. energy: ~369 kWh/yr | Price range: $600–$750

Best Value French Door (33″): Samsung RF18A5101SR

For smaller kitchens that want a French-door design without a full 36-inch footprint, the Samsung RF18A5101SR is a 33-inch-wide counter-depth model with 17.5 cu. ft. total capacity. Its Twin Cooling Plus system uses two independent evaporators to keep refrigerator and freezer air separate to extend food life and limit odor transfer. It includes an ice maker, Wi-Fi connectivity via Samsung’s SmartThings app, Power Cool and Power Freeze modes, and Energy Star certification. The 33-inch width is a significant advantage for kitchens with narrower openings. Note: Samsung’s service network can have longer wait times in some regions — check availability before purchasing.

Depth: 28.5 in. | Capacity: 17.5 cu. ft. | Est. energy: ~448 kWh/yr | Price range: $1,100–$1,500

Best Large-Capacity Counter-Depth: LG LRFLC2706S (Counter-Depth MAX)

The LG LRFLC2706S resolves what was long the core counter-depth trade-off: it delivers 26.5 cu. ft. of storage in a counter-depth footprint — previously only achievable with a standard-depth unit. The Counter-Depth MAX uses thinner walls and advanced insulation to achieve this. It includes an internal water dispenser (no exterior mechanism, which reduces complexity), an ice maker, Door Cooling+ for even temperature distribution, a PrintProof stainless finish, and Wi-Fi via LG’s ThinQ app. Energy Star certified. Yale Appliance’s 2026 reliability data ranks LG as one of the top performers for first-year service rates in this category.

Depth: 29.25 in. | Capacity: 26.5 cu. ft. | Est. energy: ~632 kWh/yr | Price range: $1,700–$2,200

Best for Food Preservation: Bosch 800 Series B36CT80SNS

No other freestanding counter-depth refrigerator matches Bosch’s food preservation system. The B36CT80SNS uses dual compressors and dual evaporators, keeping refrigerator and freezer air completely separate to prevent humidity fluctuations that accelerate produce spoilage and limits odor transfer. Bosch’s FarmFresh System includes VitaFreshPro automatic temperature and humidity balancing for different food types and SuperCool/SuperFreeze modes for rapid chilling of new groceries. The adjustable FlexBar adds organizational flexibility. Energy Star certified. Yale’s 2026 service data shows Bosch’s first-year service rate at 12.7% — higher than LG but with notably fewer cooling failures; its strength is sustained temperature stability rather than low failure probability.

Depth: 24 in. (case); 29 in. with handles | Capacity: 21 cu. ft. | Est. energy: ~530 kWh/yr | Price range: $2,800–$3,500

Best Premium Option: GE Profile PVD28BYNFS (4-Door French Door)

The GE Profile PVD28BYNFS is a 4-door, 27.9 cu. ft. French-door model with a door-in-door design for quick-access storage without opening the main compartment — reducing cold air loss on high-traffic items. GE’s TwinChill dual evaporators maintain optimal humidity and temperature in fresh-food and freezer sections independently. Includes a hands-free, sensor-controlled AutoFill water dispenser, an adjustable-temperature middle drawer with four preset modes for meat, beverage, snacks, and wine, as well as an LED light wall and Wi-Fi. Energy Star certified with an estimated operating cost of approximately $91/year. GE has the widest service network of any major appliance brand, which matters over a 10+ year ownership horizon.

Depth: 36.75 in. (standard depth; counter-depth version also available) | Capacity: 27.9 cu. ft. | Est. energy: ~760 kWh/yr (est. $91/yr operating cost) | Price range: $2,400–$3,200

Counter-Depth Refrigerator Comparison

*GE Profile PVD28BYNFS is primarily standard-depth; a counter-depth version is available at select retailers.

Getting the Most From Your Refrigerator

The most efficient refrigerator you can buy is the one you already own, as long as it’s working properly. To make your fridge last longer, take these simple steps:

• Set the refrigerator to 35–38°F and the freezer to 0°F. These are the optimal food-safe temperatures.
• Clean condenser coils 1–2 times per year. Dusty coils force the compressor to work harder.
• Check door seals. If a dollar bill slides out easily when the door is closed, the gasket needs replacing.
• Keep it three-quarters full. Both overfilled and mostly empty refrigerators are less efficient.
• Turn off the anti-sweat heater if your climate doesn’t require it, as it’s one of the bigger phantom draws.

Editor’s Note: Originally published on March 24, 2021, this article was substantially updated in April 2026.

The post Buyer’s Guide: Most Efficient Counter-Depth Refrigerators appeared first on Earth911.

https://earth911.com/home-garden/efficient-counter-depth-refrigerators/