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MQ Submersible Aquarium Heater, 200-500W LED Display Fish Tank Heater with External Thermostat Controller and Thermometer Sticker, Auto Thermostat for Tank 30-80 Gallon 500W for 70-80 Gallon Tank
![I bought these fluval heater and it's made for up to 30 gallon tanks , but it doesn't seem to be heating my 20 at all, i have it set to 82 I bought these fluval heater and it's made for up to 30 gallon tanks , but it doesn't seem to be heating my 20 at all, i have it set to 82](https://i.redd.it/5hzrbl79lb9a1.jpg)
I bought these fluval heater and it's made for up to 30 gallon tanks , but it doesn't seem to be heating my 20 at all, i have it set to 82
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Hitop 50W/100W/300W Adjustable Aquarium Heater, Submersible Glass Water Heater for 5 70 Gallon Fish Tank 50W for 5-15 Gallon
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hygger Submersible Fish Tank Heater with External Color LED Digital Temperature Controller - Hygger Wholesale
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