Yeah for sure you need a PH tester (digi if possible) I bought one for like $20 off ebay. The grow i'm on (my first) I haven't used a PPM meter. Just start off using a lesser dosage then whats recommended on the nutrient bottle (like 1/2 strength) and gradually work your way up.
i tested the ph of my well water when we moved in here.... its fine... i have no ph, ppm, ec, etc meters of any sort; dont really think that is necessary
i tested the ph of my well water when we moved in here.... its fine... i have no ph, ppm, ec, etc meters of any sort; dont really think that is necessary
i tested the ph of my well water when we moved in here.... its fine... i have no ph, ppm, ec, etc meters of any sort; dont really think that is necessary