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Re: uptake rate

> In one hour. 
> Is that possible? Could nutrient uptake and whatever its subsequent
> involvement in coloration is occur that rapidly? Or am I just imagining
> things?
> Bob O.

In a hungry tank? Yes, 40 minute uptake times are reasonable for a few
nutrients from source to sink (PO4 at least). K and NO3 are similar I would
think based on additions when I ran them down down low. I know PO4 better as
I have looked closer at PO4 and the cycle is simpler and perhaps a better
model. N gets messier. K could be some of it also. Or the combo of both.
PO4 is very fast in a visual assessment of the plants. I think NO3 and K are
not far off. 

Tom Barr