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Old 01/12/2017, 04:08 AM   #6
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Join Date: Nov 2015
Location: North Carolina
Posts: 1,847
From my experience, any time you see an area of pigment loss, suspect marine velvet and treat for it. A heavy bio-load like you have would allow for very quick spread of a disease like marine velvet. You don't always get spots on a fish from this disease. Like ich it often attacks the gills first and the fish die without a mark on them.

"The good thing about science is that it's true whether you believe it or not." Neil deGrasse Tyson

Current Tank Info: 90 gallon reef tank
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