Hello SvonOrelli
Thank you for your question. The pH value of this cleaning solution is between 7.4 and 8.4. The amount of cleaning solution you add to the water in the tank is up to you. However, we recommend no more than 6 caps for a Braava jet m6, for example. We hope we have been able to help you. Otherwise, please feel free to contact us again.
Best regards,
Your iRobot Team