Molly With Cotton Ball On Fin

SenorDeuce

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Aug 19, 2010
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Location
Somerville, MA
Tank size: 55 gal planted brackish (only about 40g full)
pH: abut 7.4
ammonia: 0
nitrite: 0
nitrate: 5ppm
kH: unknown
gH: unknown
tank temp: 74F/23C
Fish: Pair of dalmatian mollies, three fry. 2 Mudskippers.

My male dalmatian molly has a white/grey cotton ball looking growth attached to his anal fin. He's still alive but very sluggish, and a couple of times already I thought he has dead. All the other fish seem fine. Nothing has been added recently to the tank. I do water changes about once a month (the tank is so sparsely stocked right now). The water is brackish with a SG about .003-4. I'm thinking flexibacter columnaris and I should treat with melafix or something similar. Please help I don't think he has much time. Thanks.

Trying to attach a picture but not sure that it's working. Hopefully you can see this.
molly with cotton ball.jpg
 
esha 2000 worked wonders for my fish when they had columnaris and the myxaxin by waterlife was inefficient at best.
 
Myxazin by waterlife and pimafix.
 

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