ok, so my soil ph seems to like to be at 7.7ish, which isn't to good for me since preflowering is just starting now. I've tried using lemon juice, and vinegar(separate of course). After i apply the ph will fall a little bit, maybe to around 7.2 However, when i come back the next day, its back at 7.7. everytime. what can i do? thanks guys!