07-02-2009, 09:08 AM
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I've used Kordon's NovAqua for 15 years, never had reason to use another. It removes chlorine, chloramine and heavy metals, and adds a protective coating for fish. The ones the others have mentioned are much the same but have (I believe) an ammonia detoxifier. I would only use that if there is ammonia in the tap water (some places do have this unfortnately). Otherwise, I prefer to let the bacteria handle the amonia naturally and not interfere with the cycle. Ammonia "removers" do not remove ammonia, they detoxify it so it is still there. But the bacteria actually remove it by consuming it. I've never seen the point of another chemical in a tank without need.
Another comment on the water I'd forgotten earlier, is that transferring water from an existing tank is transferring everything in it--ammonia, waste, pathogens, whatever. No need to overload a new tank with all this. We've all agreed not to transfer water, but this is just another reason.