Papa_Tanswered grow question 3 years ago During the veg phase in coco you want to be more in the 5.8-6.0 PH range when giving your water.
Also you say you carbon filter your water which is fine. I hope you’re collecting that water and letting it sit for more than 24 hours to let the chlorine evaporate out of the water before giving it to your plants. I’m assuming your flittering your home tap water a little.
I’d say your just a little short on cal/mag at the moment.
That’s my best solution. Hope that helps friend 🤙