Ah I dont have a ph meter, what is another way of fixing it. I’m not even sure if the stuff I’m giving the plants have calcium in them. Should I buy calmag? Or is it just a ph problem and should i check the ph of the water I’m giving them now?. The ph shouldn’t have changed since day 1 since I’ve been giving them the same distilled water. Unless the nutrients or mammoth p have changed the ph without me knowing.