hi everyone,thanks for the input. we got our 404 witha complete 55gal. setup we bought used for a 100 bucks. broke the aquastop trying to get it apart(fiddling with it). contacted hagen about parts,we'll see. still a little confused about the gravel. maybe i'm as dumb as a box of rocks?lol. Hound, how small, like the kind from the lfs? don't the plants root in this stuff? do they use the waste that settles at the bottom at all? now i'm wondering if vacuuming would hurt them? confused. sorry for the dumb questions, but we want to start this tank out right. thanks for all your help everyone