Congo Tetra community
- 8 × Congo Tetra
- 6 × Bronze Cory
- 3 × Molly
- 6 × Silver Hatchetfish
- 1 × Pearl Gourami
- 3 × Bamboo Shrimp
69% stockedOpen in builder
Tank size guide
75Gallon Tank: Stocking Ideas, Heater & Filter Size
Same length as a 55 but much deeper front to back, which makes aquascaping and territories far easier.
- Dimensions
- 48" × 18" × 21"
- Volume
- 75 gal · 284 L
- Heater
- 225-375 W
- Filter flow
- 300-450 GPH
- Filled weight
- ~750 lb
- Gravel (2" bed)
- ~100 lb
- Weekly water change
- 18.8 gal (25%)
- Water weight
- 626 lb
75 gallon stocking ideas
Each plan passes the Tank Builder's compatibility check with no conflicts and room to spare. Open one to tweak it.
Gold Barb community
- 12 × Gold Barb
- 6 × Panda Cory
- 1 × Bolivian Ram
- 6 × Odessa Barb
- 1 × American Flagfish
- 14 × Cherry Shrimp
70% stockedOpen in builder
Silver Dollar community
- 5 × Silver Dollar
- 1 × Bristlenose Pleco
- 1 × African Butterfly Fish
- 6 × Black Ruby Barb
- 1 × Blood Parrot Cichlid
- 3 × Vampire Shrimp
69% stockedOpen in builder
Try it yourself
Build your own 75 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
75 gal · 284 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 75 gallon tank
Popular freshwater species whose recommended minimum is 75 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 75 gallons
75 gallon tank FAQ
How many fish can go in a 75 gallon tank?
It depends on the fish, not a fixed number. A good example for a 75 gallon is 8 Congo Tetra, 6 Bronze Cory, 3 Molly, 6 Silver Hatchetfish, 1 Pearl Gourami, 3 Bamboo Shrimp, which comes to about 69% 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 75 gallon tank?
A 225 to 375 watt heater. Go toward 375 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 75 gallon tank need?
Look for 300 to 450 gallons per hour of flow. For messy fish or a busy tank, go up to about 600 GPH.
What are the dimensions of a 75 gallon tank?
A standard 75 gallon is about 48" long, 18" wide and 21" tall. Brands vary slightly, so measure before buying a stand or lid.
How much does a 75 gallon tank weigh?
The water alone weighs about 626 lb. With glass, gravel and decor, plan on roughly 750 lb, so use a stand made for aquariums.