These marking's on the cots fist started showing up about 3 days ago and now they are getting bigger. They are potted in a 50/50 mix of foxfarm ocean forest and coco coir. I have been making sure to let the water sit out before I water them to let all the chlorine evaporate out of it, I also do level tests before the watering to make sure levels are 0(or dang close to it). I do not see any bugs, and I have also put out lady bugs just in case.