Ok my mistake i run koralia 4's at 1200gph each and my return pump is a 1200gph magdrive combined with my nano im making around 3800gph this isnt enough? my nano is directlly infront of my last acro colony. I talked to the place where I last got my corals their salinity is 1.024 where mine was 1.023 so I doubt thats the issue. The bulbs in my system are around 7 months old and getting dim, I run them about 8'' above my 18'' deep tank. About the salinity....I use two hydrometers which give the exact same reading every time,you wouldnt trust that?
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