Metals in fresh water tanks?

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Summary - Is quick cure safe for biological filters and plants as well
of fish? Thanks guys, especially about the stainless steel auto parts
store and quick (not twist) ties recommendations and all of the rest of
you all. Later!

Yes, Quick Cure (if memory serves) is Malachite Green and Formalin. My
understanding is that while it will not affect plants or bacteria in a
significant way, it is still quite toxic, so you should avoid exposing
the fish to very prolonging periods of exposure, and the dosage must be
reduced for small and scaleless fishes. Two-three weeks of low level
exposure would be the maximum that I would use.
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