Punchmananswered grow question 5 years ago I use Advanced nutrients, their entire line is PH perfect and they have a app called bud labs that does all the calculating for you, just enter your nutrient and resevior size and it gives you exact dosage. (Weekly) another helpful tip is to flush your res the last day of your feeding Scedule before nutrient change (I use flawless finish) to prevent nutrient build up. E.C and PPM I never check because it’s all calculated to safe levels. Last but not least this is a nice new product to the market I am currently using to regulate the PH. I add distilled water, and nutrients, Done! Keep growing strong my friend! 💪🏾
https://growershouse.com/perfectph-natural-ion-ph-balancer-capsule#!