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Old 04-24-2012, 06:58 AM   #2 (permalink)
gr33nthumb
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Default Re: HELP!!!!! Nitrite spike in established tank after treating with MELAFIX

Actually it does not harm the bio-filter, have never personally had an issue, or heard of anyone having an issue with it. Was anything changed? Substrate, filter media, big bio load change, large plant mass change? I would look at that type of thing. If it was an established tank then there had to be a large upset for the bio-filter to get screwed up! Throw some prime in there and wait it out!
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