I feel so dumb asking this question... Anyway, I'm breeding my betta fish, so the water is halfway. I cut a piece of airline tubing and hooked it to a air stone and put it inside the filter. Then I got the main airline tubing and hooked it to it and hooked it to a valve, then hooked that to the air pump... Is that right?? After few minutes the bubbles stop coming out of the filter... It's making me so mad! Any ideas?