A.S Aquarium fish shop - Heating the aquarium The usual way of heating aquarium water is with one or more heater/thermostats. These are glass tubes with an electric element and thermostat inside
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Fish Tank Aquarium Heater - Adjustable Temperature Submersible Thermostat Heater - China Heater and Aquarium Heater price
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WTTTTW Aquarium Heater, Submersible Auto Thermostat Heater Fish Tank Water Heater and Adjustable Temperature with Suction Cup,100w : Amazon.co.uk: Pet Supplies
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SunGrow Betta & Turtle Submersible Aquarium Heater with Thermostat, Electric Heat Controller for Tropical Fish Tank Water Temperature, 10-watt, up to 5-gal - Walmart.com
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Bnzaq Fish Tank Aquarium Heater - Adjustable Temperature Submersible Thermostat Heater,25W/50W/100W/150W/200W/300W : Amazon.co.uk: Pet Supplies
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