piranha45 said:my 13'x13' bedroom has 3 running AC500s (Ac110s) and a penguin mini. The only noise comes from the water splashing.
Now that I think about it I've never heard my AC110 without my air pump running ( Rena 400 ). Just assumed it was noisy because it's so big.
My bio wheel would make a annoying splashing noise every few minutes. drove me crazy so I gave it away.