Amazon.com: DaToo Aquarium Heater Adjustable 50W Submersible Fish Tank Heater with Electronic Chip Thermostat Suitable for Marine Saltwater and Freshwater : Pet Supplies
AQUATOP HTG-200 200 Watt Premier Glass Heater with Protective Guard : Aquatop
Amazon.com: Aquael Ultra Aquarium Heater - for Freshwater and Saltwater Aquariums (150 Watt / 24-40 Gallons) : Pet Supplies