I currently have a 30gl with 2 fish, 2 anemones, and 2 corals. I just cant kick the red slime problem. Phosphates are 0, added another powerhead,and skimming 24/7. Only bad thing is, I currently have a skilter. I was thinking of going with the prizm, or getting a cpr aquafuge. Which would be better? Also the tank is 7 mths old. TIA.