Aquarium Tank Sizes

Explore stocking guides for every standard aquarium size. Each guide includes compatible fish species, stocking recipes, and red flag warnings to help you build a thriving tank.

US Imperial

2.5 Gallon Nano

standard
2.5 gal / 9.5 L12 x 6 x 8 in / 30 x 15 x 20 cm
3 compatible species

5 Gallon

standard
5 gal / 19 L16 x 8 x 10 in / 41 x 20 x 25 cm
18 compatible species

10 Gallon Standard

standard
10 gal / 38 L20 x 10 x 12 in / 51 x 25 x 30 cm
37 compatible species

15 Gallon Standard

standard
15 gal / 57 L24 x 12 x 12 in / 61 x 30 x 30 cm
49 compatible species

20 Gallon High

high
20 gal / 76 L24 x 12 x 16 in / 61 x 30 x 41 cm
89 compatible species

20 Gallon Long

long
20 gal / 76 L30 x 12 x 12 in / 76 x 30 x 30 cm
91 compatible species

29 Gallon Standard

standard
29 gal / 110 L30 x 12 x 18 in / 76 x 30 x 46 cm
93 compatible species

30 Gallon Breeder

breeder
30 gal / 114 L36 x 18 x 12 in / 91 x 46 x 30 cm
118 compatible species

36 Gallon Bowfront

bowfront
36 gal / 136 L30 x 15 x 21 in / 76 x 38 x 53 cm
93 compatible species

40 Gallon Breeder

breeder
40 gal / 151 L36 x 18 x 16 in / 91 x 46 x 41 cm
121 compatible species

55 Gallon Standard

standard
55 gal / 208 L48 x 13 x 21 in / 122 x 33 x 53 cm
144 compatible species

60 Gallon Breeder

breeder
60 gal / 227 L48 x 18 x 16 in / 122 x 46 x 41 cm
144 compatible species

75 Gallon Standard

standard
75 gal / 284 L48 x 18 x 21 in / 122 x 46 x 53 cm
154 compatible species

90 Gallon Standard

standard
90 gal / 341 L48 x 18 x 24 in / 122 x 46 x 61 cm
156 compatible species

125 Gallon Standard

long
125 gal / 473 L72 x 18 x 22 in / 183 x 46 x 56 cm
163 compatible species

150 Gallon High

high
150 gal / 568 L72 x 18 x 28 in / 183 x 46 x 71 cm
168 compatible species

180 Gallon Standard

standard
180 gal / 681 L72 x 24 x 24 in / 183 x 61 x 61 cm
174 compatible species

EU Metric

Global Aquascaping