thanks for the feedback..
should be ok without covering as the feeders are the peck-n-dribble kind so they won't have access to the water source or the heater itself..
I'll go and fully submerge one and see what happens !
Hello,
I hope this is the right place to ask this question and that it's not too stupid a question..
This, by the way, has nothing to do with fish !
I have some chickens in my garden and the cold weather keeps freezing their water.
I congratulated myself on buying some aquarium heaters...