| | Re: Tiny super efficient CO2 reactor
With a sponge on the outflow the performance is actually MUCH better. If you get too many bubbles coming out of the sponge then you are injecting too many bubbles and the pump/sponge combination doesn't have enough time to disolve them all so some get expelled.
One if these reactors is enough for a 75 gal. tank with tons of light with a bubble rate of about 2 bubbles per second.
Without a sponge the tiny bubbles fly everywhere and make the water look not completely clear. Plus a lot of them get wasted. If you add a sponge in front of the same pump you will need to reduce the CO2 bubble rate about 30 to 50%. Impressive savings.