How do you know when to change the water?

[999]

.........A few predictive text errors, but I'm sure you get my drift.

[Flyonthewall]

i relate small ozone bubbles to a low PH condition.  they fizz like carbonation when it gets extreme.

[999]

PH was okay, but I will take it as a sign that all is not well in future.

I had thought that my water was clear and in good condition but its not until you have new water that you realise that it was not that great. As someone said, there's nothing like new water and you do forget what new water is like.