Well, I still have some in my tank, looks like the phosguard may be helping. My snail is moving again, the sand doesn't have as much slime. It will take some time. I need another powerhead and was wondering about the koralia pumps. What size should I get? I have alot of xenia and some colt coral oh yeah and green torch but don't want to rip them apart. I put a rio 600 in last night and about blew everything apart. AAAHHHHH!!!!!