first, I have an amircle sl (hang from back) filter w/ protein skimmer arriving tomorrow, which I'll use for my 55 gal set up. Is this a reliable unit? I've read that their rio powerheads aren't that reliable, so now I'm a little nervous about it. Next, the guy at the LFS told me that, when I place live, cured rock into the aquarium, it should cycle that day and will be ready for a fish or two by the following day. Is this true or should I wait longer before introducing fish into my aquarium? Thanks and any other advice would be appreciated.