Well, I have 2 tanks. I have a 20 gal long that is just the tank, and a 45 gal that is the tank and stand. I need a new top for the 45 gal for sure. But I really need some guidance on what kind of filters and equipment would be best. I know a bit about it all already, but I have barely scratched the surface of it all. I know that I want a fuge and sump and all that, but I am wondering if I need a different tank or if I can use the 20 gallon. I don't mind using it for that. I am not sure what type of modifications I would have to do to use it. Like I said, I have a basic understanding, but not a lot.