I have the Aqueon 50 watt preset (to 78) heater and it's the perfect size but doesn't believe up to the task. It has to be small around 7 or 8" or under ideally.
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What size is your pico?
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Small Aquarium Heaters That Actually Work: Best Picks For 1 To 10 Gallon Tanks (Tested On 20+ Setups) | FishLab
Find the best small aquarium heater for 1 to 10 gallon tanks. We tested 20+ models to help you choose safe, reliable heating for tiny aquariums.fishlab.com
Since you have an inkbird any heater will do (for now) these preset small heaters are cheaper than cheap even compared to regular cheap aquarium heaters. I have a 10w heater that was cooking a 2 gallon before I put an inkbird on it. Another 10w that I've only had for a few months has already died.5 gal. Room temp will be around 73-75. I have an inkbird controller for a heater.

