My current rock layout is not ideal, so am looking to build a new scape and then swap out the old rock with the new scape how is the best way to do this woth out too much imbalance in my system? My system is only 7 months old. I have around 40lbs rock and matrix in my sump if that helps for the bio load as i take out rocks and put in new. I like to do it in 2 moves one section then the other.

