Hey everyone. I have a question regarding filtration for my 20 gallon long Shellie tank. I am currently running an AC70 HOB for filtration and I also have a AC20 powerhead for additional circulation. Does this seem like too much? Once and a while I'll turn the powerhead off, but I am thinking of rescaping the tank and moving the powerhead further down into the tank and try to create a flow across the sand towards the filter intake. Thanks for the input.