at last, manage to set up my 1.5 ft cube.
my current setup is using a ehiem 1250 as a return pump without going thru the chiller..
my assessment .... the flow is weak and is definitely not enough:(, added in mp10 as my wavemaker and what a cool toy
as for the 1/5hp chiller, it took just 10mins to chill 0.5 degrees...i am happy with the chiller