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Old 03-15-2014, 03:58 PM   #14 (permalink)
Zapins
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Default Re: Fe Test Kit & Dtpa/Eddha

Hmm interesting. Yes the color chart helps a lot.

How much is their photometer?

I found a couple of digital photometer tests that were pretty nicely priced a while ago. I wonder how they stack up vs. the test you have? I'm not sure we can get that iron test kit you have in America.

Digital test kits:
https://www.aquaticplantcentral.com/f...tml#post664222
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