After I get back from vacation next week I plan on getting my new tank. I'll be going from my 36g to a 90g. I plan on using new sand and giving all my rock that I currently have (may grab some from reefcleaners too) an acid bath before using it. I'm starting over with the rock b/c I'm having bad HA issues and I cannot figure out where the PO4 is coming from. I think it may be one or two of the larger pieces I'm currently using since my previous tank didn't have any issues. I was thinking about using some of my current sand to transfer then just transfer all coral contents to the new tank. I'm guessing this would still cause a standard cycle to occur? I'm not in a real big hurry to move it over but it'd be nice to do it sooner than later. I've seen people do whole tank transfers before. Any recommendations?