The calculator I use is hereThank you guys for your help, I'm going to try sump remover. Is there a calculator that is used for the amount of stump remover needed?
On a side note, I have some mad corals right now. I did a 20 gallon water change the night before and one my hammers haven't been as fluffy, the polyps aren't out on my pc rainbow, and my fox flame completely bleached out looks like rtn. The fox flame was already bleached out so that may have weakened it already.