09-27-2013, 11:09 PM
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I've used it in my dirted tanks to help rid the initial tannin leach, it seems to me to work along with water changes, much better than carbon, and the good thing is you can recharge it and use it multiple times. I had to recharge it often, however, in the early stages, and tend to remove it when the water becomes clearer.
My personal opinion is I don't see why a tank would need purigen other to remove colour and odor, which shouldn't be a problem in a maintained tank, other than tannins from wood or dirt, and maybe green water, but I never had that issue. I try to use the least amount of chems possible, and feel it must remove fertilizers and nitrates consumed by the plants, if it is a planted tank.
I have bleached my purigen, than soak in the suggested amount of water conditioner with no problems. I will use nothing else than this in the future, if I have to.