shimmy

I got my 75 setup with 100lbs of sand, around 20 lbs of driftwood and filled it up and the water level is about a quarter inch difference from each side length wise, I spent 20 min banging shims in on the high side and it doesn't seem to be doing much, the shims are thick enough and I have...

I got two more geo's in my 55 yesterday and one is 'shimming" They all 3 now shoal together but the new two sit in the filter output all day. This video is almost exactly what I've been observing. They don't have ick, no white or red patches, normal color... Water is perfect but ph is...