I have had a GN Pleco for 17 days now. Yesterday I first noticed it has developed some white splotches on its skin. Eyes not sunken, belly not sunken and not bloated, it was moving around sucking on glass and rocks yesterday. I tried to catch him and photograph him yesterday, but it just got to be too much commotion--figured I was doing more harm than good chasing him all over the tank with a net. How do I tell if this is aggression from other fish, or some kind of fungus/bacterial infection?
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