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Re: [APD] distasters in the hobby

Thomas Barr wrote:
> The 7:1:8 ratio seems to be fairly robust but as the nutrients
> get down to the levels in your example, the plants become very
> limited, all submersed macrophytes are limited at 0.02ppm PO4
> and few test kits(no hobbyists kits) can reproduce and detect
> 0.01ppm   of PO4 without large error. Run a few low level PO4
> test and you'll find this out. Big error bars.

Is that ratio expressed a N:P:K, or NO3:PO4:K?

Jerry Baker
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