In order to lower the pH in the feeding tank there is the pH- series. There are different solutions available for the vegetative (growing) and generative (blooming) phases.
Maintaining the right pH-value is crucial to your plant's ability to take up nutrients. That's why CANNA developed the pH-series. This series contains pH-adjusters which can be applied throughout the complete cultivation cycle. To bring the pH down, there is CANNA pH-. To adjust the pH upwards you can use CANNA pH+.
CANNA pH- Grow can be used to reduce the pH value of the nutrient solution during the vegetative period.