DOMICA 50W Adjustable Aquarium Heater, Submersible Water Heater for Small Fish Tank (8-16 gallons) with Free Thermometer Sticker 50W: 8-16 gal is up for auction in Pet Supplies. The current bid is $2.00, 80% below the $10.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.