75 Gallon tank dimensions
48×18×21inches
Length × width × height. In metric, 121.9 × 45.7 × 53.3 cm.
A standard 75 gallon aquarium is 48 inches long, 18 inches front to back and 21 inches tall. By the numbers it holds 78.5 gallons to the brim, which is more than the name says. Once you add gravel and leave a gap at the top, expect a little less water than that.
How much a 75 gallon tank weighs
Empty, the glass tank weighs about 123 pounds. Filled with water and two inches of gravel it comes to roughly 842 pounds, before rocks, wood or equipment.
That is the weight of several people standing in one spot for years. Put it on a purpose-built stand, across the floor joists or near a load-bearing wall, and check an upstairs floor before you fill it.
| Empty tank | about 123 lb |
|---|---|
| Water (75 gallons) | 626 lb |
| Gravel, 2 inches deep | about 93 lb |
| Filled, with gravel | about 842 lb |
| Load on the floor | about 140 lb per sq ft |
Stand, lid, heater and filter sizes
The stand and the lid both follow the footprint, 48 by 18 inches. A stand has to support the whole bottom frame, so it can be bigger than the tank but never smaller.
The 75 gallon has the same 48 x 18 inch footprint as the 60 gallon breeder, 90 gallon, so they share stands and lids.
For a heated tropical tank, a 300 W heater suits a normal room. Pick a filter rated to turn the water over four to six times an hour.
| Footprint | 48 x 18 in (6 sq ft) |
|---|---|
| Volume | 75 gal (283.9 L) |
| Heater | 300 W |
| Filter flow | 300 to 450 gal per hour |
| Typical glass | about 3/8 in thick |
What fish can live in a 75 gallon tank
How many of each fish would fill this tank on its own. Mix species and the numbers come down, so plan a real community with the calculator.
- Betta1 only
- Neon tetraup to 88
- Ember tetraup to 133
- Guppyup to 44
- Harlequin rasboraup to 59
- Zebra danioup to 53
- Cherry barbup to 53
- Platyup to 53
- Panda coryup to 53
- Bronze coryup to 35
- Honey gouramiup to 6
- Dwarf gourami1 only
- Pearl gouramiup to 4
- Tiger barbup to 44
- Mollyup to 32
- Angelfishup to 6
- Fancy goldfishup to 4
- Bristlenose pleco1 only
- Boeseman's rainbowfishup to 18
- German blue ramup to 2
- Electric yellow labup to 18
- Discusup to 8
- Oscar1 only *
* Fits by volume, but the footprint is under what Seriously Fish recommends for the species.
Too big for this tank
- Clown loach needs a bigger tank: the recommended minimum is a 71 x 24 in footprint.
- Common goldfish grows too big for this tank.
- Common pleco grows too big for this tank.
- Bala shark needs a bigger tank: the recommended minimum is a 94 x 24 in footprint.
Gear for a 75 gallon tank
Searches on Amazon for the right size. Check the tank size or flow rating on the listing before you buy.
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