I am not sure about glass beads, but 2 cups cups of sand in a fluidized state. Will bio filter about 20 pounds of live fish.
Talk nice to Ken. He's the one who helped my design my dual Ultima 2000/22" BioWave glass bead setup for my 1000g tank.
i only use my ultimas for bio and the backwash system so cant give much input.
but i do love my ultimas lol.
How loud are they when running?
Exactly!
none of the system i run ultimas are in the house so to me it silent lol
but when near by i only hear the hum of the pumps so pretty quiet over
Hmm, so no clattering media. Do you think a pair of 1000's would be overkill on a 450?
all.