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Old 01-28-2013, 10:43 PM   #8
Cthulhu
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Quote:
Originally Posted by pejerrey View Post
Don't worry about no3, is harmless in that amount.
You should worry about nh4 and no2 (ammonia and nitrite) as those are the toxic ones.
Ammonia (NH3) is toxic, but not ammonium (NH4+)
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