Mattlikesfish36 Posted April 6, 2022 Author Share Posted April 6, 2022 On 4/6/2022 at 10:57 AM, Seattle_Aquarist said: Hi @Mattlikesfish36 If we look at the chart above we see that the bond between the DTPA chelate molecule and the iron molecule is the easiest to "break" (and make the iron available to the plants) when the pH is below 6.8 - 7.0 so that is when I would dose. -Roy @Seattle_Aquarist thanks! I have been trying to read up on the topic and see your responses in forums way back in 2008! You have been at this for a while it seems Link to comment Share on other sites More sharing options...
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