I have some bubba kush clones that I planted roughly a week ago. Some of the plants are starting to show problems like leaf edges curling up, and some brown/yellow spots on random leaves. I know this can be associated with heat stress but I have excellent air movement and the plants are over 3 ft from the lights (1000w MH). So I decided to check the runoff ph to see if there was some lockout of salt buildup going on. The water going in is RO water with PH of 6.90 the runoff coming out had a PH of 5.21. This seems very low to me but I have never had this problem. Also my PPM at EC x 700 are coming out maxed at 2520. Seems way off to me. Will a solid flush get these numbers back in order or do I need to add lime to the soil? The soil is a 3 part fox farm blend and they have only been given nutes one time (fox farm grow big and big bloom recommended amount).
mickeymac Reviewed by mickeymac on . Runoff Ph Question I have some bubba kush clones that I planted roughly a week ago. Some of the plants are starting to show problems like leaf edges curling up, and some brown/yellow spots on random leaves. I know this can be associated with heat stress but I have excellent air movement and the plants are over 3 ft from the lights (1000w MH). So I decided to check the runoff ph to see if there was some lockout of salt buildup going on. The water going in is RO water with PH of 6.90 the runoff coming out had Rating: 5