Quote:
Originally Posted by taricha
K. First, even Hannah Ultra low has an uncertainty of in the ballpark of .012 so I don't know that your target is consistently measurable.
But that's likely not what's going on...
If you have plenty of available N and normal conditions, light, etc then small amounts of P will be gobbled up quickly.
In my tank I threw a bunch of food in, and exported nothing for weeks and watched P go up while N stayed undetectable. So I dosed N plus food, then of course P went to undetectable.
It took heavy feeding + large doses of N & P to get detectable levels of both.
So what you're seeing is not that strange.
All systems are different. So my results may not follow in your tank.
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Cool, thanks Taricha, glad to hear I am not crazy!