So, you bought a "20-gallon" tank at the local pet store. You brought it home. You filled it afterward fancy dragon stone. You dumped in two inches of costly volcanic soil. Now, youre looking at it and wondering: why does the medication dose for a 20-gallon tank setting behind its going to slant my fish into neon mutants? Well, here is the cold, hard truth. Your 20-gallon tank is probably holding just about 14.2 gallons of actual water. This is why you dependence the best aquarium substrate calculator volume calculator for perfect measurements. Most people just wing it. They eyeball the water line. They guess. Then, they admiration why their pH is vacillation following a pendulum or why their expensive reef salt isn't mixing to the right salinity. Ive been there. I similar to approximately wiped out a colony of scarce Blue determination shrimp because I thought I had more water volume than I actually did. Math matters.

Most entry-level hobbyists think a rectangle is just a rectangle. You assume the length, the width, and the height. You multiply them. You divide by 231 (if you are operate inches to gallons). Boom. You think youre a genius. But youre not. Youre forgetting the internal aquarium measurements. Have you looked at the glass? High-end rimless tanks use glass that can be 12mm or even 15mm thick. If you statute the outside, youre calculating the volume of the glass, not the water.