Yep it acts like a massive stone on the filter tube, but you get a fine mist of bubbles in the tank, they are so tiny on mine that the water sometimes looked milky, once the CO2 was off the water was crispy clear, was just the amount of really tiny bubbles coming out of the spraybar.nry said:Is the UP diffuser passive/non-powered then? Not particularly expensive and if it reduces the amount of CO2 needed due to efficiency it would save money long term.
Because of that I have opted for an Aquamedic 1000 inline reactor now, no more bubbles in the tank