65 Gallon tank dimensions
36×18×24inches
Length × width × height. In metric, 91.4 × 45.7 × 61 cm.
A standard 65 gallon aquarium is 36 inches long, 18 inches front to back and 24 inches tall. By the numbers it holds 67.3 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.
This size is less standardized than most. Check the maker’s listed dimensions before you buy a stand or lid.
How much a 65 gallon tank weighs
Empty, the glass tank weighs about 91 pounds. Filled with water and two inches of gravel it comes to roughly 704 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 91 lb |
|---|---|
| Water (65 gallons) | 542 lb |
| Gravel, 2 inches deep | about 70 lb |
| Filled, with gravel | about 704 lb |
| Load on the floor | about 156 lb per sq ft |
Stand, lid, heater and filter sizes
The stand and the lid both follow the footprint, 36 by 18 inches. A stand has to support the whole bottom frame, so it can be bigger than the tank but never smaller.
The 65 gallon has the same 36 x 18 inch footprint as the 30 gallon breeder, 40 gallon breeder, 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 | 36 x 18 in (4.5 sq ft) |
|---|---|
| Volume | 65 gal (246.1 L) |
| Heater | 300 W |
| Filter flow | 260 to 390 gal per hour |
| Typical glass | about 5/16 in thick |
What fish can live in a 65 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 76
- Ember tetraup to 114
- Guppyup to 38
- Harlequin rasboraup to 50
- Zebra danioup to 45
- Cherry barbup to 45
- Platyup to 45
- Panda coryup to 45
- Bronze coryup to 30
- Honey gouramiup to 6
- Dwarf gourami1 only
- Pearl gouramiup to 4
- Tiger barbup to 38
- Mollyup to 27
- Angelfishup to 6 *
- Fancy goldfishup to 3
- Bristlenose pleco1 only
- German blue ramup to 2
- Electric yellow labup to 15
* Fits by volume, but the footprint is under what Seriously Fish recommends for the species.
Too big for this tank
- Boeseman's rainbowfish needs a bigger tank: the recommended minimum is a 47 x 12 in footprint.
- Discus needs a bigger tank: the recommended minimum is a 47 x 18 in footprint.
- Clown loach needs a bigger tank: the recommended minimum is a 71 x 24 in footprint.
- Oscar needs a bigger tank: the recommended minimum is a 59 x 24 in footprint.
- Common goldfish grows too big for this tank.
- Common pleco grows too big for this tank.
Gear for a 65 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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