Aero-Cloner water changes?

Quick question, how often do you change your Aero-Cloner's water. I currently use R/O ph adjusted water with a few drops of superthrive and some h202, its been running like this for 10 days. I'm just trying to get a general idea of how often people change the water.

Man, I hardly ever change the water on my cloner. I just add fresh back into the rez as needed. If I see algae starting to grow on the sides of the tub, that's when I change the system out. Now don't laugh, I get almost 100% rooting.

Vi

Sweet, this is my first time aero cloning and I started giving up on it and pulled some clones and realized oh shiit there are bumps on em and now roots on the ones still in it.