Fish Tank Sizes

30 Gallon Breeder tank dimensions

36×18×12inches

Length × width × height. In metric, 91.4 × 45.7 × 30.5 cm.

A standard 30 gallon breeder aquarium is 36 inches long, 18 inches front to back and 12 inches tall. By the numbers it holds 33.7 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.

36 in long18 in12 inFrontSide

How much a 30 gallon breeder tank weighs

Empty, the glass tank weighs about 44 pounds. Filled with water and two inches of gravel it comes to roughly 364 pounds, before rocks, wood or equipment.

A weight like this is fine on any sound floor, but it needs a stand built for aquariums: ordinary furniture is not made for a load that never moves.

Empty tankabout 44 lb
Water (30 gallons)250 lb
Gravel, 2 inches deepabout 70 lb
Filled, with gravelabout 364 lb
Load on the floorabout 81 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 30 gallon breeder has the same 36 x 18 inch footprint as the 40 gallon breeder, 65 gallon, so they share stands and lids.

For a heated tropical tank, a 150 W heater suits a normal room. Pick a filter rated to turn the water over four to six times an hour.

Footprint36 x 18 in (4.5 sq ft)
Volume30 gal (113.6 L)
Heater150 W
Filter flow120 to 180 gal per hour
Typical glassabout 1/4 in thick

What fish can live in a 30 gallon breeder 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 38
  • Ember tetraup to 57
  • Guppyup to 19
  • Harlequin rasboraup to 25
  • Zebra danioup to 22
  • Cherry barbup to 22
  • Platyup to 22
  • Panda coryup to 22
  • Bronze coryup to 15
  • Honey gouramiup to 6
  • Dwarf gourami1 only
  • Pearl gouramiup to 4
  • Tiger barbup to 19
  • Mollyup to 13
  • Angelfishup to 3 *
  • Fancy goldfish1 only
  • Bristlenose pleco1 only
  • German blue ramup to 2
  • Electric yellow labup to 7

* Fits by volume, but the footprint is under what Seriously Fish recommends for the species.

Plan a 30 gallon breeder community

Neon tetras schooling above corydoras catfish in a planted tank

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 needs a bigger tank: the recommended minimum is 75 gallons.

Gear for a 30 gallon breeder 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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