Amicus
Aquarium Advice FINatic
Forgot to ask this earlier. I always unplug my heaters during a water change and yesterday noticed condensation in one of my heaters. I have two as my place is cold in the winter. The heater is a 300w Aqueon submersible. The heater seems to be working ok as temperature is stable. The condensation is towards the top where the power indicator light is located. Is this normal?