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Punky wood and nitrates



Can any one tell me, does punky wood cause higher nitrates? My tank used to
be .5 ppm and than recently it shot up to 25 ppm. I took out the wood to
move it and found out inside that it was punky, I cleaned it out with a
knife and then put it back in. The nitrates are down to 15 ppm so I wondered
if this was the problem. The wood didn't smell bad, it was just really soft.

Jennifer
in B.C. in the springtime!