ViaAqua 100-Watt Quartz Glass Submersible Heater with Built-In Thermostat Go to amazon.com Related posts 12 best aquarium heater 100w for 2022 FeatureHigh quality quartz glassFully-submerisbleVisible temperature settingFor use in fresh or saltwater aquariums DescriptionHigh quality quartz glass submersible heater with a visible temperature readout