i use the stock return pump, but a quiet one from my sump return.
I would take out all SPONGES and bio-rings and that stuff.
There are hidden sponges deep in the back compartments, take them all out. Add Rubble to the first chamber, i'd add it all the way to th water level. THen i would add your cheato to the second chamber with a small light so it will grow, the flow through the cheato can be pretty rapid and with all this back there it will act as mechanical filtration plus will be great for the whole system
