So you can eliminate dead spots where the rocks sit in the sand, flow can go around as well as under the rocks, fish and inverts can swim and sift the substrate under the rocks, more LR exposed to the water column for better biological filtration. There are alot of benefits. If im going to do it im going to use clear acrylic rods instead of PVC. My tank is gonna get a complete overhaul. Im also gonna use cerium oxide to remove some scratches from the glass. I will document the whole process. Its will be alot of work but at the end i know im gonna be happy and it will look AWESOME!!