cetihio 6-pack hot tub cartridges compatible with frog ease floating system – for hot tubs spas up to 600 gallons, easy install is up for auction in Patio, Lawn & Garden. The current bid is $1.00, 98% below the $59.99 MSRP, in Good Condition. Bid on this item at our Amelia - Ohio Pike location before the auction closes.