black fin rot?

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rba718

Feeder Fish
MFK Member
Mar 15, 2008
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Miami, FL
Hey MFK, I've delt with fin rot in the past as I'm sure most of us all have.

I just finished cycling a 120 gallon tank. Midway I put in two Oscars to help the process through and I just added in my big RTC hybrid. They seem to be getting along "So far" but now I see this...

My Oscars have a bit of "black" fin rot, on their bottom fins. It's dark and frayed. Is this serious form of fin rot? Are there special meds I should use for it?
 
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