I've been wondering if my system would benefit from a refugium. I have a 29g Eclipse with a Prism skimmer, a 55 watt PC, about 20 lbs. of LR and a 1 1/2 inch sand bed. I have 3 fish: tomato clown, purple firefish and a six-lined wrasse. Corals are: candy, trumpet, daisy, lobophylia, green star...