I have just hooked up a reactor. At first I was using ceramic, then I moved onto running my CO2 hose into the uptake of my canister...I think this contributed to my now rattling impeller, as I read a few comments that the gas build up and cavitation within the canister can shorten the life of an impeller. Anyway, I really like my reactor. 100% dissolution and I still get healthy pearling from my plants. Highly recommended. All I need now is for my new impeller to turn up!
I am considering trying to hook up a ceramic diffusor inside the reactor to see if I can push the efficiency and rapidity of dissolution just that little bit further. But that's just a pipe dream, atm...