They say that you should use 1 lb per gallon of water.
answered 2 years, 10 months ago
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About 100!! haha My 6.6 Gallon tank has 4 bags in it and I don't even have a full bottom coverage. These rocks are big though; if you did a 3-4 inch thick bottom, a lot of gunk would get under them and make the tank gross.
answered 3 years, 4 months ago
Young Harris, GA
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