some times cheep brands will leach things...my motto is spend the extra buck
I share Germanman sentiments exactly, however the cheep black diamond carbon does rather well when its a FO tank, but when we look to our reef tanks, we need to go a bit further then black diamond and as for the UV, I never when running a soft coral tank ever had a UV, when we talk of corals, UV just doesn't mix in well. I say you should lose the UV. Run ultraviolet lights as well, I think that is what their called>
Buddy