Got the New, Improved Koralia 450 gph..... it's a little stronger than the old Koralia-1 was (400 vs 450 gph). And smaller!! Almost half the size!! Even better -- it's controllable! I am seriously considering selling my old one and upgrading to two of these new ones, with a 2-outlet thirty second timer for either powerhead. What's more: the smaller size means smaller grates, and less chances of a seahorse poking his tail through and hurting herself.
Pssst.... I bought a rusty gorgonian while I was there. Don't tell The Wife!!!