the likeliness of something infecting your aquarium from that is like .0001% depending on your location of course. if you live close to a body of water it will increase the risk substantially but even then i'd say less than 1%
I got 2 heater sets and a ink bird temp controller
Cobalt 300w dual heater. Comes with 2 heaters - $80 for each pack that comes with 2 heaters
https://www.aquaticwarehouse.com/cobalt-aquatics-neo-therm-heater-with-lcd-display-300-watt
Inkbird temp controller. Everyone needs this. Save your...