Could you please give a example on how you could plug up a tunnel, because I have a resin log that has holes and I am not sure how to close up the holes. I don't want my bp to get stuck...
I've used aquarium silicone sealant too, & used it to glue a cork into a larger hole, for example. If the hole is in driftwood, you can also glue a bit of wood in the hole to match.
Rudeness is the weak man's imitation of strength. Eric Hoffer(1902 - 1983)
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” ~ Gandhi