Description: Sal puts three fish tanks in order by volume of water per fish. Order the tanks by volume per fish from least to greatest. All right, so here for Tank A, it's going to be 40 liters for every five fish. 40 for every five fish, and let's see, 40 over five is eight, so you have eight liters per fish, is the rate at which they have to add water per fish for Tank A.*Teacher Advisor is 100% free.