I have chamber 1: floss, sponge, rowaphos in a bag, floss then another sponge. Chamber 2 is a protein skimmer. Chamber 3 is maxi jet 1200 and heater.

I had chamber 1 and 2 filled with live rock but that was a nitrate trap.

I also had chamber 2 as a refugium but that did not gob well.

After 14 months with 1 inch sand, I started siphoning it out. Going to go barebottom now. The nutrients were just way too high. I have 45 lbs of rock and only 2 clowns in it.