I have this plant that grew up really nice and bushy but as soon as it started flowering, it began having MG and K deficiencies. I have read a ton since then and teste the coco on top of the pot and the PH was 6.4, so I thought it was fine according to what is expected but the runoff coms out sometimes lower than what I put in and in the best of cases, it comes out the same.
I read the ph inside the medium should be the middle between what goes in and what goes out but what if you get about the same and still you have deficiencies?
Regarding the flush, I've been kind-of flushing for the last 2 weeks, very tired now of measuring recipes for the PH as it fluctuates a lot in my tap water. One day it comes out at 6.9, the other day at 6, with little variation on the PPMs, fluctuating from 35ppms to 70ppms.
Regarding ppms, I put in someting like:
- 1g of sitting water ( to get rid of chloride as much as possible ).(*) -- PH: 6.6, PPM 35.
- 1CC Flora Nectar (K+Mg) -> ph 6.5, ppms = 95ppm
- 6cc A+B -> ph: 5.9, 650ppm
- 6cc Canna Boost -> ph, 5.6-7, 650-660ppms.
- Few drops of PH up -> 5.8-6.0 - 650-660 ppms.
The flush or runoff comes out only 100ppm less and the ph from what goes in vs what goes out barely fluctuates. Still I have some sort of lockout and last night for example, I add a few more drops of PH (6.25) cause the runoff was coming out at 6.0 vs 6.4 on the plant without problems and what is expected on coco, Today I did the same and the run off came out even lower than yesterday.
Seems like there is something inside the pot causing it to acidify the medium regardless of what goes in.
Could it be the Subculture-M producing too much CO2 in the root zone an thus acidifying it too much?
In that case, should I water with plain water to kill some of them?
More data:
50-50 perlite coco, made a tea with 1 teaspoon of subculture AB + 1 tablespoon raw cane sugar ( sugar + K ) in 1.5L of water, and it bubbles just as much as 1 cup of sugar + yiest. Seems it produces more CO2 than yiest, or I could be wrong but it definitely is producing OC2 at root level.