Sequence 750 External Centrifugal Pond Pump is a Sequence-branded product in the ownkoi catalog. External centrifugal pump from Sequence, sold for koi-pond installations requiring continuous-duty external pumping. Rated 4,300 GPH at zero head. Specifications and pricing reflect the manufacturer-published or retailer-published data at the most recent catalog refresh. Verify the live listing on the source retailer page before purchase.