A home aquaponics aquarium is one of the most elegant expressions of the technology — a self-contained living ecosystem that grows herbs and greens while housing beautiful fish, all in your living room, kitchen, or home office. Done well, it’s a conversation piece, a stress-relieving focal point, and a genuine food producer in one.
What Is an Aquaponics Aquarium?
An aquaponics aquarium combines a standard fish tank with an integrated growing system — typically a small grow bed or NFT channel mounted on top of or beside the tank. Fish waste provides nutrients to plants growing above, and plant roots filter the water before it returns to the fish. The result is a closed-loop mini-ecosystem that requires less maintenance than a standard fish tank and produces edible herbs and greens as a bonus.
What Size Aquaponics Aquarium Should You Start With?
For a first home aquaponics aquarium, a fish tank in the 60–200 litre range is ideal. Smaller tanks (under 40 litres) are more difficult to keep stable — water parameters fluctuate rapidly and leave little margin for error. Larger tanks (200+ litres) produce more nutrients and support a wider range of fish and plants, but require more space and infrastructure.
A 100–150 litre tank paired with a 60 x 30 cm grow bed on top is a sweet spot for most home growers — large enough to be stable, compact enough to fit on a standard aquarium cabinet.
What Fish Work Best in a Home Aquaponics Aquarium?
Goldfish — The Practical Choice
Common goldfish, comets, and shubunkin are the most practical fish for home aquaponics aquariums. They’re hardy, tolerant of temperature fluctuations, inexpensive, readily available, and produce excellent nutrient output for their body size. They also look attractive and are entertaining to watch.
Tropical Fish for Heated Indoor Systems
In temperature-controlled indoor environments, larger tropical species — certain cichlids, large barbs, or even tilapia (where legal) — can be used. These require a heater to maintain water temperature and produce more nutrients than goldfish due to higher metabolic rates.
Native Fish
Silver perch, jade perch, or rainbow fish (native Australian species) are excellent for indoor systems and require no permits in most states. They’re well-adapted to Australian water conditions and provide a meaningful native-species connection to your system.
What Plants Grow Best in an Aquaponics Aquarium System?
The best plants for home aquaponics aquariums are compact, fast-growing, and useful:
- Basil — thrives in the warm, humid conditions near an aquarium and provides continuous harvests
- Mint — extremely vigorous; pot it separately within the grow bed to prevent it overwhelming other plants
- Chives — compact, hardy, and continuously productive
- Lettuce (compact varieties) — butterhead and cut-and-come-again varieties work well in small spaces
- Watercress — loves moisture and warmth; perfect for aquaponics aquariums
- Small pak choi — fast turnover, attractive foliage
How Do You Set Up an Aquaponics Aquarium?
The Basic Setup
A simple aquaponics aquarium uses a submersible pump in the fish tank to pump water up to a grow bed positioned above. Water floods the grow bed (filled with clay pebbles or small gravel), then drains back into the fish tank below via gravity. A bell siphon or overflow standpipe controls the flood and drain cycle.
Lighting
Plants require at least 12–16 hours of good light daily for productive growth. Position your system near a north-facing window, or install a purpose-built LED grow light above the plant section. Aquarium lighting designed for fish tanks is typically insufficient for plant growth — use a plant-specific LED grow panel for the best results.
Cycling the System
Before adding plants, cycle the system to establish beneficial bacteria. Add a small amount of fish food daily and test ammonia and nitrite until both register zero — indicating a healthy nitrogen cycle. This process takes 3–6 weeks. Once cycled, add fish and begin planting.
What Maintenance Does a Home Aquaponics Aquarium Require?
Daily: feed fish, observe plant and fish health, check pump is running. Weekly: test pH, ammonia, and nitrite; trim plants; harvest any ready produce. Monthly: clean pump intake strainer; check plumbing fittings for any drips; top up water level with dechlorinated water. Aquaponics aquariums typically require significantly less maintenance than conventional fish tanks — the plants do much of the water filtration work naturally.
Frequently Asked Questions
Can I use my existing fish tank for aquaponics?
Yes — most standard aquariums can be adapted for aquaponics with the addition of a grow bed, pump, and basic plumbing. The tank itself needs no modification. Check that your existing pump has sufficient capacity to lift water to the grow bed height.
How many fish can I keep in a 100-litre aquaponics aquarium?
For goldfish in a home aquaponics system, 3–5 adult fish in 100 litres is a comfortable stocking density. Aquaponics extends the tank’s capacity somewhat over conventional fishkeeping due to the additional filtration, but avoid overcrowding.
Will the grow bed overflow and flood my floor?
A well-designed overflow system (standpipe set correctly, return drain pipe of adequate diameter) makes flooding extremely unlikely. Use a drip tray under the system during initial setup and testing to catch any minor leaks while you dial in the plumbing.
Does an aquaponics aquarium smell?
A healthy, well-maintained aquaponics system has a mild earthy smell — similar to a healthy garden. It should not smell of ammonia or rot. Any unpleasant odour indicates a problem: dead fish, anaerobic zones in media, or water quality issues that need addressing.
Can children help with a home aquaponics aquarium?
Absolutely — home aquaponics aquariums are excellent educational tools for children. Feeding fish, harvesting herbs, and testing water quality are all engaging, hands-on activities that teach biology, ecology, and sustainable food production in a tangible way.
Ready to build your own beautiful home aquaponics system? Get the complete setup guide here and create a living food garden in your own home.
having same problem . My celery and radish and coriander shot to seed.
Also Cauliflower . I grow in a tunnel style hot house with shade cloth sides so might have been temp related, I’m experimenting with what I can grow so just learning. Have 195 silver perch and 3 gold fish in 7000/8000 litre tank with 5, 2.4×1.2 gravel filled grow beds.With an 3.6mtr round grow bed. About to add some vertical columns for Straw berry and more lettuce. Thanks for your post .
Regards Anthony