Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I am not actually trying to scare the deer.
In fact, I do not really want a loud thunk at all. The active tipping and the sound of water are more important.
This will be near a pond, and I could arrange it so it is all above the pond, so any spills or leaks flow back to the pond. The pond has fish, so any clear sealer would have to be fish-safe.