Hello folks , Im trying to figure out how much chemi-pure elite to put in my 8 gallon biocube, We are having a heck of a time with red slime, and have increased flow , do major frequent water changes , and just cant seem to kick it. So unlkess there are other suggestions I think im going to give it a try. the light bulbs are 3 months old we have shortened the light cycle also . Any help is greatly appreciated. Chuck P and Anna Maria.