No - I don't know if i'll get that accurate, if I even do it. It was just a thought.
jpappy is correct.. using ro/di will bring the pH down.. the water would have no capacity to swing the RO water to a different pH..
Pm d you
Might be Black Beard Algae (BBA), which can look fuzzy and grayish. In my experience it like fluctuating CO2 levels, which is going to be common in low
Don't they bonth have "Fish" in their names?