Pond Logic Stainless Steel Feeding Ring · 24 in is a Pond Logic-branded product in the ownkoi catalog. Larger 24-inch feeding ring from Pond Logic with a stainless steel rim, sold for use with mid-size to large ornamental ponds. 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.