Im about to upgrade to a 75 gal next weekend. (VERY EXCITED)! I cant afford to spend sooooo much on the live rock to fill the tank. I noticed that calireefer has used a floating rock work method that doesnt use as much live rock. I also know that there is filler rock..... but it still is exspensive as some of the live rock I have seen. Any suggestions as to how I should fill my tank are greatly appreciated. Thanks in advance Everyone!!!!!!