Laith said:Mixing Fe and Phosphates together can lead to the Fe precipitating out into Iron phophate. This, as I understand it, is not usable by plants...
Ian H said:My fish area looks like an alchemists store already.
As my PMDD mix contains no PO4 compounds can I safely assume that my traces within the mix are not being compromised?m lemay said:The higher the concentration of PO4 is in a solution the more likely that you'll have a reaction with Fe. So yes in a fish tank with average levels of PO4 it is more likely that the plants will get to use the fe before it reacts with po4, Where as in a dosing solution, po4 levels are much higher and dwell time is much longer(sitting in a bottle for weeks at a time), this is a perfect environment for a reaction to FePo4.