Aqua UV Classic 25-Watt UV Sterilizer is a Aqua UV-branded product in the ownkoi catalog. Classic-series UV sterilizer from Aqua UV in 25-watt size. Manufacturer documentation cites suitability for ponds up to approximately 2,000 gallons at the recommended flow rate. 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.