Purple Punch Clone

Buds are starting to pop, but the PP did not like me last week, the temp and pH fluctuations might have caused some issues Watering 80 oz every 4 days with alternating water and beginning bloom mix. Hard to tell what is wrong as the pH and temp have been fluctuating quite a bit. I still need to do more testing in the soil but runoffs have been 11-20% with pH around 7.0-7.3. Day after has been 6.4 so i might be going down into the 5's with the soil not too good at buffering. The soil itself might be going into the 50s and locking out Nutes are mainly the bloom but when i grew this before i used no nutes and no runoff, maybe this strain doesn't like the lineup i am using. Some lower leaf veins are really dark but hope some effort in monitoring the pH will help, if not i will do a flush and go from there. The one leaf in last pic got a few issues and some wind burn that doesnt help either. So far this strain is not looking like a good candidate for the triple heater, SOG or a big bush seems more its style