I was wandering around in my local Petco the other day and saw a bunch of these on an endcap:
Hydor Mini Aquarium Heater
They are pretty small and don't have any sort of adjustment (automatically heat the water a couple degrees warmer than ambient room temperature), but thought I would pass it along in case they will work out with anyone's extremely small system.
Hydor Mini Aquarium Heater
They are pretty small and don't have any sort of adjustment (automatically heat the water a couple degrees warmer than ambient room temperature), but thought I would pass it along in case they will work out with anyone's extremely small system.