The sump is nasty, thats 3 weeks growth, there must be some truth to a fuge light out competing with display lights, well here's proof. The fact I dont have nitraits still baffels me even dosing No3 I ran a series of testes yesterday and still only showing 2 but corals have nice colors. now check this coral's color It did this when I had 0 po4 and o no3 , I started feeding oyster feast every day and the side that gets flow turned a nice green and the back stayed brown, the next pic is some acros from Boom and they are happy with the nitrate dosing and my leather is also happy and started reaching out, I removed the marine pure a couple of weeks ago, but hes had good PE for about 6 months although always the same size now he seems to inflate with the defining fingers.