Congo Tetra community
- 10 × Congo Tetra
- 1 × Bristlenose Pleco
- 3 × Sailfin Molly
- 5 × Silver Dollar
- 1 × Pearl Gourami
- 3 × Vampire Shrimp
70% stockedOpen in builder
Tank size guide
90Gallon Tank: Stocking Ideas, Heater & Filter Size
A tall 4-foot tank with lots of water volume for larger centerpiece fish.
- Dimensions
- 48" × 18" × 24"
- Volume
- 90 gal · 341 L
- Heater
- 270-450 W
- Filter flow
- 360-540 GPH
- Filled weight
- ~900 lb
- Gravel (2" bed)
- ~100 lb
- Weekly water change
- 22.5 gal (25%)
- Water weight
- 751 lb
90 gallon stocking ideas
Each plan passes the Tank Builder's compatibility check with no conflicts and room to spare. Open one to tweak it.
Bleeding Heart Tetra community
- 18 × Bleeding Heart Tetra
- 1 × Buffalohead Cichlid
- 1 × Bolivian Ram
- 8 × Boeseman's Rainbowfish
- 1 × African Butterfly Fish
- 1 × Nerite Snail
69% stockedOpen in builder
Clown Rasbora community
- 13 × Clown Rasbora
- 1 × Candy Striped Pleco
- 1 × Blood Parrot Cichlid
- 7 × Dwarf Chain Loach
- 1 × Blue Gourami
- 3 × Bamboo Shrimp
70% stockedOpen in builder
Try it yourself
Build your own 90 gallon tank
Pick your tank size, add fish, and instantly see if they get along, how full the tank is, and the heater and filter you need.
Your fish will swim here
90 gal · 341 L
1. Tank size
gal
2. Add fish
Start with the fish you want most
Search above or tap the box for popular picks. Schooling fish come in at their minimum group size.
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Compatibility, stocking level, heater and filter sizes, and the water each fish likes all show up here as you build.
Fish that fit a 90 gallon tank
Popular freshwater species whose recommended minimum is 90 gallons or less. Check they get along in the builder before you buy.
- Neon Tetra1.5" · 10+ gal · groups of 6+
- Green Neon Tetra1" · 10+ gal · groups of 8+
- Cardinal Tetra2" · 15+ gal · groups of 6+
- Betta2.8" · 5+ gal
- Crowntail Betta2.8" · 5+ gal
- Halfmoon Betta2.8" · 5+ gal
- Peaceful Betta2" · 10+ gal
- Plakat Betta2.8" · 5+ gal
- Guppy2.4" · 10+ gal · groups of 3+
- Bronze Cory2.8" · 20+ gal · groups of 6+
- Panda Cory2" · 20+ gal · groups of 6+
- Platy2.5" · 10+ gal · groups of 3+
- Molly4.5" · 20+ gal · groups of 3+
- Sailfin Molly5" · 30+ gal · groups of 3+
- Zebra Danio2" · 10+ gal · groups of 6+
- Harlequin Rasbora1.8" · 15+ gal · groups of 8+
- Ember Tetra0.8" · 10+ gal · groups of 8+
- Cherry Shrimp1.5" · 5+ gal · groups of 10+
- Otocinclus1.6" · 10+ gal · groups of 6+
- Bristlenose Pleco5" · 30+ gal
- Albino Bristlenose Pleco5" · 30+ gal
- Honey Gourami2" · 10+ gal
- Dwarf Gourami3.5" · 15+ gal
- Pearl Gourami4.5" · 30+ gal
Popular fish that need more than 90 gallons
90 gallon tank FAQ
How many fish can go in a 90 gallon tank?
It depends on the fish, not a fixed number. A good example for a 90 gallon is 10 Congo Tetra, 1 Bristlenose Pleco, 3 Sailfin Molly, 5 Silver Dollar, 1 Pearl Gourami, 3 Vampire Shrimp, which comes to about 70% of a cautious stocking limit. Small, tidy fish like tetras and rasboras let you keep more; messy fish like goldfish and plecos fill a tank much faster.
What size heater do I need for a 90 gallon tank?
A 270 to 450 watt heater. Go toward 450 W if the room runs cool. At this size, two smaller heaters at opposite ends are safer and heat more evenly than one big one.
What size filter does a 90 gallon tank need?
Look for 360 to 540 gallons per hour of flow. For messy fish or a busy tank, go up to about 720 GPH.
What are the dimensions of a 90 gallon tank?
A standard 90 gallon is about 48" long, 18" wide and 24" tall. Brands vary slightly, so measure before buying a stand or lid.
How much does a 90 gallon tank weigh?
The water alone weighs about 751 lb. With glass, gravel and decor, plan on roughly 900 lb, so use a stand made for aquariums.