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Re: Sera test kit and fertilizer

Michael Moncur wrote:
> The Sera test definitely works with chelated iron, or at least it works 
> with whatever (DPTA, etc.) is in Tropica MasterGrow. If you give it 3-4 
> hours it works, but the response after 3 minutes is negligible.

	Indeed, I saw this effect too. If you leave the test standing long
enough and ANY iron concentration you will get a color. And it will
deepen the longer you leave it. So at what point in time do you read the