Thanks for the response. Other fish look fine. Water conditions are fine, I keep the heat at 80 degrees. I dont want to add chemicals either but dont want my fish to died. I have it on stand by incase the tang gets worse but dont know if I show be cautious and use it. Also I dont know how it will affect my macro algae.
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90 gallon reef
20 gallon sump w/fuge
260 watt orbit lighting
-Marineland dual bio wheel filter,110 lbs live rock, 2 Clarkii clown fish, yellow tang,spotted tang, blue hippo tang, 2 red starfish. 10 gallon quarintine tank |