what is the problem ?

soil coconut

hi buddy, every time I add CalMag 0.5 ml/l, my tap water is 140ppm, after that the starting water becomes rich in CalMag 200ppm. next base A+B 3ml/l each, Bigbud 1 ml/l and Micochum 0.8 ml/l. the resulting solution is 800ppm 6.0 PH. I water it with 1.75 L of water. drainage was 600 ppm and PH 6.8-7, I spilled 9 liters of clean water, ppm dropped to 200 and filled with solution. PH does not move, it was not possible to reduce it. I think this is because of Micochum, I am using it for the first time and the PH during the growing season was 7.4 and now it is 6.8-7.

If it's more on the upper portion of your plant, to me, it resembles a Calcium Deficiency. The question is, why? Is it lacking calcium because the soil is depleting, or, is there plenty of calcium in your soil, but another nutrient is locking it out (Potassium excess) or a way off pH is the reason. Often times it's excessive salt build up around the roots themselves which causes the issue, and many others. Flushing your soil out is the best method to treat many possibilities at once. It will wash out the salts that are accumulating in your medium. It also allows you to set your pH back to where you want it if in fact it has strayed outside of the ideal range (5.8 to 6.8 range) If you have a 3 gallon pot then you'll want to run at least that much pH adjusted water through your medium so that there is lots running through the medium and out the bottom. After that just put your plant back in the environment and check it daily to see if the progression of the issue has stopped spreading. If it has, good, then you got the issue. Wait till the pot dries out and feels light to the touch, then introduce food again and the appropriate ratio for the week you are in. If you want to play it safe you can do a half strength dose. If you don't want to do that (some don't due to mycorrhizae and bacterial inoculants) then you can grab yourself a bottle of Calmag from the grow store. Every company has a version. If you wanna stay organic then you can crush up some egg shells into dust and top dress your soil and water it in. Calmag will be much quicker remedy though.