There's plenty of nutes in the rezes for the size of the root systems my plants have at harvest. Meaning, PPMs don't drop much, maybe 25 ppms every couple days
Based on previous grows with essentially the same hydro system, my roots tend to be relatively small, but highly efficient
I am positive it was the microbes that dropped a previously stable 6.0 pH rez down to 4.5 . I communicated with NPK as soon as I noticed it
The solution MAY be to add Kelp. I say MAY because I only got RAW Kelp last week, and made a fresh batch of Grow nutrients; Yucca > Silica> Grow> Humic > Microbes, all the same ratios as previous new batches, then added the Kelp. Solution tested @ ~ 5.3pH. Alas, I went a little heavy on the Up.
After a couple sessions to make sure Up was completely dispersed in this Bubble Ponics system, it is back down ~ 6.0. I mentioned I will be replacing the 4 air stones with low pressure aero for the upcoming seedlings. in addition to roots not being submerged 24/7 any change in nurient solution is immediately available during the next automated feed cycle
Since fming the top a couple days ago, all the lower node branches started growing :cool: