Originally Posted by Hardstuff
I have the ista one. It is cheap & does not work well. All the other ones on the page are cheap.
Green leaf aquariums look the best but if you go to their home page they are always out of stock. Sorry I am not much help. The CO2 diffuser is important & most diffusers are cheap & will not last long.
Gla sells up-aqua.com
glass co2 diffuser. And the atomic diffusers creates a co2 mist that most say is unappealing.