OK. After some reading I have seen threads on people using bleach, hydrogen peroxide, even excel to clean it. I'm fine with this but I'm curious as to how long people leave it soak because some of these guys say 24 hours and I don't know how that's possible as my system is "in line" and I'm not going to leave my aquarium not running for a day while this thing soaks in a bucket. I'm just going to break out a toothbrush and some bleach and have at it.
As far as I can see this reactor is simply PVC
with a rio 90 pump at the end. Has that dishwasher ring thing on it as well. I don't understand the mechanics of any of it, or what does what, I just assume it gets dirty and doesn't dissolve the CO2
as well if left unattended.