Help! Seems what was an early deficieny is getting worst! What is this? I've ordered some litmus test (and the digital one from China but paper should be here tomorrow or day after).
Could be PH? Magnesium? What? Heeelp before got worst!! :'(
It's definitely a Cal/Mag deficiency if you did not give her cal/mag nutes.
Ph fluctuation also cause this problem, so the next time feed her with cal/mag and make sure the right ph for coco which is around 5.5-5.8