• 150 watt submersible heater for tanks 30 to 40 gallons
• Electronic thermostat automatically maintains water temperature and prevents overheating extending heater life
• No adjustments are needed
• The indicator light lets you know when the water is being heated (red) and when it is at the proper temperature (green)
• Silicon carbide crystals improve heat distribution and transfer
• Strong glass tube is heat and shock resistant
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