--> Brand New! General Hydroponics pH Down About the product To maximize plant growth, the pH content of your nutrients should be slightly acidic. Experienced growers consider the ideal pH for most crops to fall between 5.5 and 6.5. Users of General Hydroponics nutrient products generally do not experience problems maintaining the proper pH range because our formulas are pH buffered. However, some important exceptions do exist. Acid content can reach unacceptable levels when nutrient solutions are mixed with poor quality water, or pH unstable media - such as rock wool and gravel products - are used, and when high plant growth rates destabilize the nutrient mix due to rapid nutrient absorption by the crop. pH Down: Acid formulated using food grade Phosphoric acid. Just add a little at a time if your nutrient pH is too high in order to lower the pH to the proper level. What's in the Package Additional Images - General Hydroponics pH Down - Choose size above FIVE-STAR SATISFACTION GUARANTEED --> Our company has a reputation for delivering excellent service, ensuring buyers' privacy, and delivering quality products at reasonable, competitive prices. We strive to earn a 5-star rating from every transaction. If you are satisfied with the product and service you receive, please take a moment to leave us positive seller feedback. In turn, we will also provide 5-star buyer feedback when your order leaves our facility. If by chance there was something unsatisfactory about your experience, please contact us, and we'll do what's necessary to remedy the problem and ensure 100% satisfaction! TERMS, CONDITIONS, WARRANTIES & POLICIES ABOUT THE HYDRO STORE Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.