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Re: KH2PO4 testing....
> From: "Pete" <peteal at sympatico_ca>
> Subject: KH2PO4 testing and overdose. (oh no)
> Anyways, mixed some KH2PO4 I got from a hydroponic store with water and kept
> adding it to my tank and tested for P levels using a Hagen kit (found all
> their other kits are great).
> After adding more and more of mix I got suspicious and tested the mix itself
> and can't detect ANY Phosphates!
It's always a good idea to do this with any test kit - and a blank
test as well!
> Now does KH2PO4 have to sit for a while
> before the P can be detected or do I just have bad test kit?
No, it doesn't have to sit at all. Either the kit is no good,
or it isn't phosphate. I _have_ had a problem in a hydroponics store
when the sales clerk evidently couldn't read the label on a big package
when weighing something out for me. I would have got a phosphate, thinking
it was the sulphate, but I saw the package.....
Paul Sears Ottawa, Canada