Help! Alot of my small Malawis have started to scratch themselves on the
sand. They seem to be trying to scatch their gill areas. I have checked the
water parameters & all seem OK. the pH is 8.0, gh 6, no2 0, no3 10. The kh
is rather high at 20. Could this be the problem?

Can anyone offer any advice on what to do?

tia,

Dee


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