im getting the equipment ready for my 75g tank and i just got my 1/4hp chiller.

before i setup my 75, im wondering if i can put the 1/4hp chiller on a 28g with half of a 20g tank sump being used?

i dont know the total volume of water, but i imagine its not that much.

will this mess up the chiller in anyway? my tank always runs at 83 degrees because of the metal halide fixture

my friend rick says it would be okay, just that the chiller wont be on as much. i thought i heard people say that you have to get the chiller rated for the amount of water you had