Check your room first
Neocaridina may be kept without a heater when indoor temperatures remain suitable and stable. A heater becomes useful if the room swings widely or drops below the conditions your colony is used to.
Measure water temperature across a full day and night. Do not decide based only on the thermostat setting or the room's daytime comfort.
Use equipment carefully
Choose an aquarium-rated heater appropriate to the tank and monitor it with a separate thermometer. Place it where water can circulate and follow the device instructions.
Avoid raising temperature just to encourage breeding. Higher temperatures can affect oxygen and metabolism, and do not guarantee a particular colony outcome.
For your own tank
A heater is only useful when it is reliable and correctly sized. Use a separate thermometer and check the device's response before leaving it unattended. If the room stays suitable without heating, avoid adding equipment that does not solve a real stability problem.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.