FoxGrow

So: day after I postet my question, The run off ph suddenly rose to 7,1. I couldn't help but wonder. So I checked the water analysis from my local supplier: I have super high Calcium and low Magnesium. This could explain that the soil (BioBizz Light Mix) can't buffer any more due to the 11:1 ratio of Cal/Mag. -- I use (cheap) citric acid to lower my ph which easily is neutralized by the calcium-kation in absence of enough Magnesium. So: I will add epsom salt to balance the CalMag ratio (water still has fitting EC level then). In addition I switched to phosphoric acid to lower my ph. This would make sense since my last grow also had these strange symptoms even thought I followed protocol. What do you think?

Thanks everyone for the help. Run Off Ph is constantly at 6.5, I water them with 6.3 Im using the Enhancer (Algae, Microbes, etc.) every 14 days, otherwise I would use compost tea. So I repotted them already and didn't add any ferts. Now I wait until they used a good amount of the nitrogen in the soil before I flip and top dress with Bloom at 3g/l.