I've have a 29 gal. Eclips running, it's been going for about 2 months and is perfect. I have 1 blue damse, 2 perculera(sp?) clowns, 1 scooter blennie, 4 blue leg hermits, 1 long tenticle anemonie, and I guess I have an anemonie crab I found in my live rock. I have to cycle water alot, but it's worth it. Good luck, keep up posted on what you put in it.