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Old 18-05-2018, 01:55 PM   #1
millenium
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Join Date: Mar 2002
Posts: 3,495
Default aeration and fish immunity

I find that is i do not on the air pump for my tank that still has a cannister filter running, my adult cichlid will have pimple like infections. With air pump on, those pimple infection sort of flatten and become red marks only.

Why is it so?
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