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Re: [APD] KH Test variance
Never used SeaChem's but haven't had much luck with iron
test kits. I think as a rule if a test kit registers
anyting at all, you probably have enough iron. Unless the
plants shows chlorosis, and you are using a trace mix, I
wouldn't worry about iron levels.
For the KH titration tests, you can double the sample
volume and then treat each drop as if it was half a drop
when using the regular sample size. This can get you a bit
more accuracy from the kit. E.g., if the regular volume is
5 ml and each drop is one degree, then with 10 ml, each
drop would be 1/2 degree.
Also, it can make a diff whether you take you sample volume
measurement at the edge or the bottom of the meniscus (the
visible curve of the liquid at the surface in the measuring
tube. General rule of thumb is to use the bottom of the
meniscus but bottom or top, consistency is key.
--- Chris Hotte <ecwh73 at gmail_com> wrote:
> Is 3dKH variance in results the norm for different test
> The Hagen test reads 5dKH and Aquarium Pharmaceuticals
> 8dKH. The
> resulting read on C02 is 23ppm vs 43ppm. Quit the
> difference. Should I
> bother to email A.P. and demand replacment testing agent?
> Secondly, I got another test kit and it appears to be bum
> as well. It's
> a seachem Iron test kit. It doesn't detect jack for iron,
> not even it's
> own refrence sample. Them I've contacted.
> - Chris.
> P.S. Bill, if you see this (you should be preparing
> rather than reading
> this). Best of luck. I know first hand that water in the
> house sucks.
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
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