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Hydor ETH External Thermal Heater (In Line) ETH 300 - 300 Watts (5/8" Internal Diameter for 53-80 Gallon Tanks) - National Pet Warehouse
AQUA REALM Freshwater Aquatics - HYDOR heaters for external canister filters now available at AQUA REALM | Facebook
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Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 1/2" hose : Aquarium Heaters : Pet Supplies
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