![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
![Amazon.com : Fluval EDGE Digital Aquarium Thermometer - 64 to 86 degrees Fahrenheit : Fish Tank Thermometer : Pet Supplies Amazon.com : Fluval EDGE Digital Aquarium Thermometer - 64 to 86 degrees Fahrenheit : Fish Tank Thermometer : Pet Supplies](https://m.media-amazon.com/images/I/61ZKuXEOX8L._AC_UF1000,1000_QL80_.jpg)
Amazon.com : Fluval EDGE Digital Aquarium Thermometer - 64 to 86 degrees Fahrenheit : Fish Tank Thermometer : Pet Supplies
![Amazon.com: Fluval E100 Advanced Electronic Heater, 100-Watt Heater for Aquariums up to 30 Gal., A772 : Pet Supplies Amazon.com: Fluval E100 Advanced Electronic Heater, 100-Watt Heater for Aquariums up to 30 Gal., A772 : Pet Supplies](https://m.media-amazon.com/images/I/71APWlTq3WL._AC_UF894,1000_QL80_.jpg)