Freshwater

Table A-2 How Many Fish Can Fit in a Tank
Tank (L × W) Surface Area Freshwater Fish (in.)
Marine Fish (in.)
20 x 10 200 16 4
24 x 12 288 24 6
30 x 12 360 30 7
36 x 12 432 36 9
48 x 12 576 48 12
48 x 18 864 72 18
72 x 18 1296 108 27
72 x 24 1728 144 36
Appendix: Tank Figures and Facts
How Much Gravel Can I Put in the Tank?
In order to determine the approximate number of pounds of gravel that will
be needed for a rectangular aquarium, you can use this formula:
Length (in inches) × Width (in inches) × desired gravel depth (in inches) × .05
= pounds of gravel
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