Tangs are MESSY fish! Have you ever seen them poop?! Yowza! Too much phosphate though is more a factor of the type of food he's feeding and possibly his water source. I'm on the road to 2 tangs in my 120. I can't imagine 4 of them in there (I wish it was acceptable though because I'd love 4 of them). Has he tried phosban or some similar phosphate aborbing thing to get rid of the phospates? Tested his RO
? Draining the liquid off of frozen foods? Those are good places to start. Do the 4 tangs get along? Which 4 does he have?
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