ok. Picked up the tank last night. Suprisingly the rock looks great and alive. Lots of corraline on it. I am going to get rid of all his sand and not use any of his water. So I'll get it set up today hopefully with new sand and fresh water ad only his rock and some of my sand. Then let it sit for a while to see what happens since I'll be running the lights on it too. I dont know if the lights and new water might cause a spike but we'll see.