Preset Temperature Heaters vs Not

[RaymondL]

I was thinking of getting a 50W preset heater versus the one with an adjustable dial. Is one better than the other and in terms of reliability?

 

[TX_REEF]

I'd always opt for an adjustable heater, what if you need to make adjustments at some point? I have had success personally with these units:

Finnex: https://amzn.to/3VHCHhJ
Helio: https://amzn.to/3XgUAVI