DIY 2 Feet Tank

[dnsfpl]

http://i34.*******.com/10ej8k4.jpg

water will flow in from top corner, a small area in spot "A"
passing through wool, live rocks, chaeto and
the return pump will push the water via rainbar, spot "B"
water will come out from the bottom, full breath, spot "C"

there will be 2 compartments in the "filter" area
first compartment will consist for top wool and bottom live rocks
water will flow to the 2nd compartment from below
i will place the chaeto and the return pump on the 2nd compartment

any improvement to add on before i start the DIY

thanks

[dnsfpl]

any comment before i start?