OKAY, I think (hope, wish, plead, and all that other stuff) that everything is working now...but it took ruining the O ring to figure out the O ring problem. Can I get a new O ring at a my lfs, if not, where can I get it?
I believe I have a 33000 model (it's for up to a 65g tank--I have a 55g)
Thanks for the help everybody!...even though it kinda began working on it's own after random tinkering...