pH control products allow us to raise or lower the pH value of our nutrient so we are operating in the best range for our type of grow media, typically 5.5 - 6.3 for hydroponics and 6.2 - 7.0 for soil.
Maintenance products should be an important part of your nutrient program. Enzymes help to break down dead roots to keep a cleaner root zone, optimizing plant health and nutrition uptake. Most Flushing/Clearing agents are designed to bind to excess mineral salts that have built up in the root zone so they can be "flushed out" with your runoff, reducing buildup and potential for "burning" in your plants. Some however are used to eliminate bacteria to maintain a sterile growing environment.