I have recently set up a 50 lit. with undergravel filter which is working fine, except for the fact it is bubbling so loud I can hear it several rooms away at night. Other than turning the air supply right down or installing perhaps a car muffler on it, any suggestions?
I also have a 180 lit with Fluvall 204 filter which works well as far as surface agitation is concerned, UNTIL I put some Ricci in. A blender could not have done a better job of decimating it and I now have small bits of Ricci scattered throughout the tank. Again, any suggestions?