Originally Posted by hbosman
I had a similar diffuser and after I found the leak near the bubble counter, it became very stable and consistent for about a month. Then One day, I came home and noticed the diffuser sprung a leak at the end cap, huge bubbles pouring out and the fish hovering at the surface. It must have happened just before I got home because the working pressure hadn't dropped and I didn't lose any fish. I did an emergency 50 % water change though. Anyway, I gave up on diffusers and went with this:
I set working pressure to 10 PSI just so the needle valve's adjustments are more gradual. so far, I like it better than A Cerge or Rex Grigg reactor. It's more quiet than the Cerge and less bubbles escaping than from the Rex. I think my Rex should have been longer though. But for $15.00, you might try it as well.
That is an issue with a diffuser. Bubbling CO2 directly into your canister or using a reactor is much safer in that sense. There is very little chance of blockage and the pressure in the CO2 tubing will always be near "0" (over atmospheric).