guianacara stergiosi scratches

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wuffer

Gambusia
MFK Member
Oct 25, 2015
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I have 4 stergiosi that scratching against the gravel. Maybe its only the 2 of them, hard to see.
There is nothing to see on them, they look fine and poop normaly. Nitrite is 0 and nitrate is normaly around 12.5 mg/l with tetra test. I change min 30% water every week. Temp is 78.8 F.

My Hyphessobrycon Erythrostigma doesn't do it

Any ideas?
 
something is making them itchy. I would try salt and if that fails prazi
 
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