try larger more frequent water changes. If you have just recently done a chemiclean, it will also brown out a little bit of your corals. GOOD LUCK!
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90 gal with 55 gal sump dual 250 double ended hqi 14k geisseman, 33 gal prop tank geisseman 150 hqi 14500k,two cpr refugiums,P.M. calcuim reactor,tunze wavebox.
12 gal nano
55 gal freshwater planted/jaguar tank with sump, pc lighting, co2 
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