Just get yourself a ruler and tape it to the inside of the tank. Dump sand into it and level off till you reach the 1" mark on the ruler. Just kidding lol... Use one of the calculators on some of the online sites.
Just get yourself a ruler and tape it to the inside of the tank. Dump sand into it and level off till you reach the 1" mark on the ruler. Just kidding lol... Use one of the calculators on some of the online sites.
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