ADVANCED NUTRIENTS - PH PERFECT GROW - 20LThe GMB fertilizer includes pH PERFECT technology, eliminating the need to manually adjust pH with every nutrient solution application. If your waters pH ranges between 4. 5 and 8. 5, this technology automatically adjusts and stabilizes the pH, ensuring your plants are in an optimal environment. You no longer need to add acids or worry about adjusting it yourself. Just focus on using one of the best fertilizers on the market and let it handle the