PMDD Iron—0.1ppm enough?
I’m wondering if 0.1ppm in the Poor Man Dupla drops system is enough.
I have 2 kind of fast growing plants (Elodea and Rotala rotundifolia(indica).
I think they compete for macronutrient. When my rotala start to grow well, the elodea slow down and devellop brown tips...
What do you think??