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Old 28th November 2006   #13 (permalink)
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Thanks Josh, I knew the tannins wouldn't harm the newts but I wasn't aware of their beneficial abilities!

My pump doesn't have a filter, but since it also runs over the substrate and the moss a bit, could it be that this is a (if somewhat slow) natural filter? Is this realistic thinking? Or should I invest a little more in an extra (though very small) filter?
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