The grow is at 42 days. The strain is Fruity Thai. I have these yellow edges on the leaves and some curling. I also have a Lemon Skunk that's in the same soil mix and it's not having the same problem. I'm using a 1/3 peat - 1/3 perlite - 1/3 vermiculite mix with 2Tbsp dolomite per gallon. I'm using Jack's Classic at the recommended strength (1/2 tsp per gallon). I'm seeing the runnoff PH at 7.2 to 7.5. I suspect the PH to be the problem. However, if so, it would seem to be because of too much dolomite. I added a bit of peat to the top 1" inch of the pot with little effect. I'm PH'ing the water to 6.0. At this point I'm thinking of transplanting to try to fix the soil PH. Either Sunshine #4 or the same mix as above but with half the dolomite. Have I diagnosed the problem correctly? Am I on the right track with a solution or are there other ideas? Any help here is much appreciated. Since this is my first grow, I'm trying to figure out a good process and don't have the experience to guide me.