two11devan
Aquarium Advice FINatic
I have a fluval 204 in fro my 30 gal. I have noticed that every once in a while it will make a wierd noise and a second after the noise, thousands of tiny bubbles shoot out of my return nozzle. Has this happened to anyone else???? What causes it? I know a little air is trapped in the unit when it is opened to be cleaned, but i cleaned it a week ago and i have noticed it before when it was running for a month without it having been opened at all. I have no idea where the air could be comming from! Just in case it matters, i am only running some carbon in the bottom tray. Any help would be appreciated!!! Thanks