Hallo,
O.k. But also a small bubble pump makes such noises, isn´nt it?
I see that the artificial food has created a problem which now filters have to solve.
I´m in good progress with living food.
But I´ve always thought it would be good for the tank if the water is in movement. But at the moment it seems to be a problem to realize it without noises and vibrations – if I
don´t cancel the HMF and take an external filter ….