I have a 75 gal reef tank and I am shopping for powerheads. I am wondering how many gph i should have for each of the 2 powereheads for my tank to be correctly circulating. Also would this be a good product to use? http://www.bigalsonline.com/catalog/product.xml?product_id=27189;category_id=2181;pcid1=;pcid2=
TIA
TIA