Hey Nash- looks like a bit of Ca defc. to me,.. i see some other finer spots here and there,...plus, coco is a huge Ca hog, owing to it's CEC quirks, it binds Ca big time until a satiation point is reached, then it gives and takes more readily, consistently,.. but the Ca level needs to be kept up to maintain it, or it keeps it from the roots... If you've been feeding light, w/o a Ca-Mg supplement, there might be a shortage,... normally the coco specific nute's will have the extra Ca and Mg you'll need...
>> pH availability for better Ca uptake is lower than 5.8, not higher, so don't adjust that direction if you do anything,.. 5.8 is fine otherwise....
>> color on the petioles in not a Ca or Mg defc, symptom, BTW... it's a co-symptom for P defc sometimes, but many strains have color normally on the petioles, plus high light exposure can do it as well, so barring other symptoms, that petiole color is not an issue...
>> you mentioned hard water... what's the ppm? yes, it can help with Ca availability, but that depends on just HOW hard the water is.. I need a reading if you can.. how are you adjusting the pH down, are the nute's alone doing it?
Wow that's a lot of info. What ppm conversation do you use just I think my EC pen does a few. My water ph is 8.2 before nutrients and around 7 after if I was adding more food I think it would come down more. It takes around 10ml down to achieve 5.8 in a 30ltr res. The ppm will follow shortly and thanks for the reply.
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