How to use Bio · pH-? Mix the necessary Biobizz nutrients and measure the pH of the mixture. Add 0.1 ml of Bio · pH to reduce the pH by 0.5 point. Add the required amount of Bio · pH-, stir for 10 seconds and measure the pH again. Add Bio · pH until the optimal pH range of 6.2-6.5 is reached and the nutrient mixture can be added to the plants. Why Bio · pH -? Bio · pH- can be used both during the growing and flowering periods, in any irrigation, and in combination with any Biobizz substrate or liquid product. Bio · pH contains no strong acids. This means that this 100% biological pH regulator does not affect the micro-life in the substrate. So your culture stays organic, from seed to harvest!