Well we tried to burn down the house. I’ve been having a cyanobacteria problem so was in the tank with a turkey baster trying to get some out. Didn’t think about the filter on the HOB overflow, well it got partially plugged to where the sump was ahead and overflowed the tank, right on the power strips, we were out and came in to a terrible smell. Good thing we were home. To see that this NEVER can happen again we are replacing the tanks with internal overflow. Question is, is there a faster way to swap them out? Obviously I want the minimum stress for the fish, and the reef tank? Is it a good time to rinse the sand?