In article ,
zxcvbob wrote:
The stem plants look like they have an iron deficiency. The tank has a
sand substrate. If I put iron supplement tablets (ferrous sulfate,
ferrous gluconate, or iron carbonyl) in the sand near the root zones of
the plants, will the plants be able to utilize the iron? My theory is
that anaerobic bacteria digesting the sugar, starch, etc in the tablets
would keep the iron from oxidizing.

Bad idea. Real bad idea. You're really much better off spending the $4
and getting a pound of FE+trace mix from hydroponics.com or gregwatson.com
and dosing properly.


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