Maybe I'm wrong, but that doesn't sound right. You don't want your return pump to be pumping more than your overflow can handle...it would overfill the tank wouldn't it?
If you have an over flow that drains 600gph, and a return pump that can return double that in the same hour, it seems to me like you would be in trouble there.
Are you sure the roles aren't reversed? Maybe it's that you get a return pump that does half of what your overflow can do? I would think that no matter what (be it 1/2, 1/4, whatever) you want a return pump that doesn't return the water faster than your overflow can drain it....
......color me perplexed. _________ 125 Gal Reef. Born March 2002 FISH: Ocellaris Clown, Yellow Tang, Fairy Wrasse, Sand Star, Fuzzy Dwarf Lion, Mandarin Dragonette, Hippo Tang CORALS: Green Striped/Red/Purple Mushrooms, Green Star Polyps, Yellow Toadstool Leather, Bubble, Frogspawn, 2 Hammers, Yellow Polyps, Open Brain, Ridge Leather, Various Zoas, Button Polyps, Kenya Tree, Colt, Elephant Ear Mushroom, Clove Polyps, Torch, Purple Clam, Rose BTA  |