Hey guys (and gals) I've had my rainbowfish tank set up for just about a month now but my largest male rainbow has a few issues id like to sort out before they escalate. Firstly, he has a bump near his caudal fin, he's had it since I bought him and the bump hasn't seemed to change or affect his behaviour. secondly, I just was informed (im away from my fish at the moment) that that same rainbow now has a lesion behind his left pectoral fin. Any help is much appreciated.
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