I am on my first grow and I am having a couple of concerns. My bottle number 2 is almost gone after 10 days. I have read multiple topics on this matter and tried all the solutions, calibrating the PH sensor, I have been using distilled water from the beginning. After doing all of this and changing the water the issue continued so I removed the bottle for now until I figure out what the issue is. I am leaning towards a damaged PH sensor?