Protein skimmer?

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HI, i have just bought a protein skimmer from my lfs and would like to know what you guys think about it.Pro Clear Motorized 75 Protein Skimmer ??? It is gonna go into my 20 gallon sump/refugium for my 30 gallon tank.
I would also want to know if that size sump/refugium would be good for my tank?? Thanks

 

[liga]

i would also know if this filtration system woulld be good to use on the water i will be putting in my tank? GXSL55R | GE® Dual Stage Water Fitration System | GE Appliances