Hmm .. interesting. I would have guessed those rocks would be OK but who knows. Well it's just like my situation really, mathematically there's no reason for me to have had nitrates above 50 in the first place but it's been fairly consistent, and I've tried just about every other trick in the book (and gone though at least 4 tank setups as well). I guess sometimes it just happens ...
On the bright side it's down to the mid 20's now and appears to be coming down nicely still.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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