DXOPHIEX Gravel Vacuum for Aquarium Fish Tank Siphon Aquarium Water Changer with Three Metal Faucet Adapter and Long Hose 50 Feet 50FT is up for auction in Pet Supplies. The current bid is $21.00, 49% below the $40.98 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.