I bought 2 AC70 filters as I had read everywhere that they were very quiet. Tank is in my room. They are both noisy. Got in touch with Hagen, so after going back and forth with them, a new filter..still noisy and sent the motor back, they send another motor. Still noisy, get a new impeller and shaft, still noisy. I tried an impeller for AC50, no help. It sounds more like the motor than the impeller, it's not a grinding noise. My cousin has 2 of them on her tank..I couldn't even hear them! It was wonderful, I had to actually touch them to see if they were on. I'm at a loss as is the lady I was dealing with in customer service..Karen, very nice. Any suggestions? I'm getting very tired of dealing with this and about ready to give up on the whole tank thing.
Thanks!
Thanks!