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CORISRX 150w/300w/500w in-Line External Heater Aquarium Heater - 150/300/500 WATT 1/2",5/8" (Applied to Both Sizes) (Black 150 Watt 5/8",1/2" Hose) : Amazon.ca: Pet Supplies
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DaToo Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter : Amazon.ca: Pet Supplies
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