Um a pH tester? Just take some of your soil and mix it with water/testing solution and test it or, let it sit for a bit, and then test with a soil testing kit.im planing on feeding my plants plant prod, but i dont kno how to test what im feeding my plants, any sugestions?.. my food is 20-20-20 for veg and 15-30-15 for bud.. also if anyone else uses this product any feedback/ dose ratios would be great ;D
any help would be great ;D