Will api super ick cure kill beneficial bacteria?

[fish 321]

Ok I’ve always wondered this and just assumed it did, but does ich medication affect the beneficial bacteria?

 

[cjcummings]

No it shouldn't affect it that much.

 

[Flyfisha]

Part of the routine when you are treating ich is to vacuum the substrate with every water change and addition of more medication ( malachite green- formaldehyde) . This constant vacuuming of the substrate is more likely to disturb the bacteria numbers than using the above medication at the recommended dose IMO. Possibility every 3 days, for at least a fortnight after the last spots are seen , if that is what your brand recommends?

I have never had an issue but that does not mean one can relax when putting poison in the water.