Cotton Looking Growths

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CJH0825

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Apr 27, 2013
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I have cotton looking growths on the gill area of my red line danios. Any idea what it could be and how to treat? They are staying at the top of the tank, Not swimming, Just saying in one area. Water parameters are...
 
ammonia = 0.25
nitrite = 0
nitrAte = 20 - 40
Low Ph = 7.6
High Range = 7.4
 
I do 50% water changes every 3 days and 75% every Saturday when I vacuum.
 
It is a 55 gallon tank that has been up and running for 3 months.
 
 
try to get a close up picture of one of the fish because it could be useful to help determine what exactly is going on due to the fact of the wide range of things it could be
 

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