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Amazon.com : 500 Watts (Size 40 to 65 Gallon) Aquarium Stainless Steel Submersible Heater/Temperature Range 17~32'c (62°f and 90°f.) : Pet Supplies
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Amazon.com: hygger Fully Submersible 500 W Aquarium Heater with External Temperature Display Controller Upgraded Double Quartz Tubes Fish Tank Heater for 65-120 Gallon, Suitable for Marine and Freshwater : Pet Supplies
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100W Aquarium Heater, Submersible Auto Thermostat Heater, Fish Tank Water Heater and Adjustable Temperature, 1Pcs - Walmart.com
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