Does anybody know what deficiency is this?
It only appears on Rotala sp. green - Rotala sp. 'colorata' and Rotala rotundifolia (stem is visible on the left) doing well. Also all other plants doing well.
I am dosing 10 ppm of NO3, 1 ppm of PO4 and 12 ppm of K 3 times a week, as well as Plantex CSM+B the day when i don't dosing macros.
KH 12, GH 13, pH 7,1 and my drop checker is limegreen - thats about 30ppm CO2