01-19-2014, 05:07 PM
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Austin, ... as you say that, that has me thinking
plant roots are in the substrate, and the substrate does have a tendancy to gain a more acidic pH, which would release any iron
i was concerned about nutrients an what to do about it in my tank till one day i had a curiosity and idea to solve, ... instead of looking at nutrients, it might just be pH
in my case, just my personal experience, ... and i hope it's not my imagination.
since getting the pH buffer the leaves are greener, which was the issue i was concerned about (pale leaves)