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ok sanababit first : how big is that thing give details 1 1 drop per second seems way to slow for the size of that unit.
mwood:
you could start to adjust these things fairly quickly days but at first your testing for nitrite not nitrate, its the test results that tell you when to adjust not time, time is what you have to give it. the nitrite output will not harm your tank unless you have goten the flow wrong. if thats not clear please speak up!!!
hope that helps
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smile its all good
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