The gallon (volume) and the inch (length) can not be equated.
A 150-gallon drum contains 0.0036 gallon per cubic inch.
The rule of thumb is 1 gallon per 1 inch of fish. But of course if you have bigger goldfish you will need more room. So for larger fish, go 1 gallon per 3 inches of fish.
Probably about 8 one inch fish, 4 two inch fish, and so on. The general rule is one inch of fish per gallon. If your fish are small, you could have 16 half-inch fish. Sometimes it's okay to go over that limit with smaller fish, but I wouldn't put more than 11 or 12 one inch fish in it.
7.5 pounds per US gallon
30 (centigrams per centimeter) = 0.026878759 ounces per inch
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The rule of thumb for stocking levels in a freshwater aquarium is 1 inch of fish per gallon of aquarium. For instance, five 1" guppies in a 5 gallon tank, or ten 3 inch cichlids in a 30 gallon aquarium.
A 150-gallon drum contains 0.0036 gallon per cubic inch.
you could put about 30,assuming they are all compatible
A gallon is a measure of volume, the inch is a measure of length, the two can not be equated. However the cubic inch and the gallon can be equated, there are 231.00010000000003 cubic inches in one US Gallon.
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Guppies are usually 1 inch long, and a good rule of thumb is to have 1 inch of fish per gallon, so as many as 30 guppies will be just fine. Although, it might be nice to add some different fish occasionally.
For twenty small (1-1.5 inch) Goldfish you should have something like a 30 gallon aquarium.
110.2 gallons per inch.
30 percent of gallon will be approximately 1.13562354 liters.
One gallon.
30 percent of gallon will be approximately 1.13562354 liters.