grefilt PWK30 Hot Tub Filter Replacements for Hot Springs Spa Filters, Watkins 31489, Unicel C-6430, Filbur FC-3915, 71825, 73178, 73250, P/N0969601, 30 sq.ft. 5-Pack is up for auction in Patio, Lawn & Garden. The current bid is $1.00, 99% below the $78.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.