Thx guys. I started Bio Pellets to get low nutrient tank mainly for SPS. Don't have many yet. Have couple bue and one creme and one green frags. I removed all caulepra from refugium. Changed water and cleaned my overflow. I found lots of debris - not sure if it was due to feeding?! But that might be a cause of some phosphate. I ran Carbon and GFO as well, might change GFO. Ive notice in my sump lots of small flower type things exactly the same as flowers on my caulepra, so i can think it is the problem. does SPS gets upset due to caulepra sexing?
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