Just some friendly advice...Water source pH can change, especially at the change of seasons. I know they say pH perfect, but I have seen my same mix be different numbers. I started growing in hydro, so I am a pH checker. Many growers can get comfortable and stop checking. Unfortunately it is totally unavoidable and is the growers responsibility to be religious about checking pH. It doesn't take long to check and adjust, but the damage done by not checking can be extreme to minimal. That being said, make sure your meters are reading right as well or get a back up liquid set. The few times I have had issues with pH, the meter went bad. Hope they are not effected to badly.
