I have a 20 high that I would like to put some inverts in. Problem is that I'm in college and trying to save some money right now. I have 15 watts of light from a T8 bulb right now. If anything (coral, anenome, or whatever else) could live in there right now that would be awesome. I do have another light fixture that I could put another bulb in if I wanted to, if I need a 50/50 or anything else I could get that. If its just mushrooms I can keep, so be it. Also, what levels of light would I need for zoanthids and some other corals?