Amazon.com : Hydor Theo Shatterproof Aquarium Heater, 100-Watt & Ideal For 14 To 26 Gallon Fish Tanks, 8.9-Inches Long : Pet Supplies
Amazon.com: Fluval E100 Advanced Electronic Heater, 100-Watt Heater for Aquariums up to 30 Gal., A772 : Pet Supplies
7.5KW Tankless FVSTR Mepple Instant Electric Tankless Water Heater 220/240V,Small Smart Water Heater Self-Modulating No Standby Losses,Under Sink Kitchen Household Shower, Hot Water Output of 2.0 GPM - - Amazon.com