Yeah man same exact problems with promix and organics!!!!! Frustrating as h$&@!!! I can't figure it out. It's some type of lock up can't b ph there's dolomite can't be cal mag it's in my fulvic acid + minerals I'm left to think it's stress from the cold soil even though my temps r optimal at pot level and air temp my dirt s kinda cold? I don't know what else it could be. I shouldn't have went cheap n got promix I should've stuck to ffof and hf!!!!!!