As its new it might just be bedding in does seem strange though. Is it in your sump?
Seffie x
can i use an ordinary sponge..like a yellow one?
I wouldn't, if you do you will have to take it out each week and clean it.....if you forget, there be trouble ahead
Take it out of the sump and do a bit of experimenting, when is it worse, it what conditions, what is it that is causing the noise......... and even, do other people think it is noisy or is it just you? However be aware, there is no such thing as a silent piece of kit over here on the saly side
Seffie x