My Datnoid got hole in the head..

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Aznsillygoose

Feeder Fish
MFK Member
Jan 21, 2009
27
0
0
Asia
I got my datnoid about a month ago. There was one hole in his head. Today I took a closer look at it, there are about 5-6 holes. What should I do? Right now I put Metronidazole at 20 Mg/Litre. I chage water about 20% every two days and give the same medication.

Is this the right way to take care of it? My friend said that his arowana used to have holes in the head too, but he used formalin at 30ppm everyday for 3 days. But I'm not sure if it's ok to use formalin with datnoid.

Please give me some advices. Thank you very much
 
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