As you know I am converting my 55 gal. to a FOWLR tank. I was wondering if I could use lace rock for the tank when I convert? I have alot of lace rock I had bought when I kept african cichlids. I must have abot 50 - 60lbs. Enought to fill the back of the tank up and leave swimming room in the front. I would add the lace rock if possible and then add a few pieces of live rock to add some benefical bacteria. I just thought it would be a good idea to save money so I wouldn't have to but all that expensive live rock. Thanks for any replies.