I’m 100% new to aquariums. My fiancé sweet talked me into a Betta fish since she was given a little tiny .7 gallon ez care tank that has the “gray” water catch bucket on the back. Petsmart carries them I think...anyway I decided to go out and get this little Betta fish a real aquarium and got a 5.5 aquarium kit. I’d like to get a good heater for him. However I can’t see myself spending 60 dollars on a heater.. all of the reviews on Amazon of people killing all of their fish with literally every single brand of heater out there has kind of scared me off. I’d really like an adjustable one, with some sort of digital display. However that may be out of my price range. Any ideas or any heaters in the 30ish dollar price range that stand out from the rest? Tank is about 16” long by 9” tall.