Then yes youll want to get a good ph pen, deoesnt have to be expensive you just want the sensitivity to be around +/-.01 and get your ph up/down and shoot for 5.8-6..2. You want it to fluctuate between those numbers, so you can measure the runoff and if the ph is high then shoot for the lower end and vice versa, but if your soil ph is in range and your nutrients are in range and your ppms/EC are good and not too high, you should have a good start. I know MC claims to not need ph adjustment, but ive heard thats not necessarily true in every case. Anyway, hope any of that helps.I just let my plants starve up until now! I give em good soil at the start then they are on their own! Rarely works out tho so getting megacrop now! Using earthbox so i need something safe to go into a reservoir for a few days potentially!