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Re: [APD] Flourish iron & KH drop
S. Hieber wrote:
> What's your method of testing for iron. For the minscule levels one needs for aquatic gardening most of those of-the-shelf tests are pretty much useless, imo. One way to make use of them, if they register any iron at all, that's usually enough.
The best test being yellow leaves IMHO, as I'm sure you agree. Just
making a note in case someone is worried about maintaining exact levels.
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