No, I don't think it is a issue. First the tanks are sufficiently lined.
Second, the water is not in the tanks long enough to be a problem. One would
have to leave the tanks filled for an extented period, maybe weeks?, to even
have the potential for a problem. So far I have never seen or heard of a wet
wing problem.

Bob

Thanks for the explanation. Do you think osmosis be a problem with
gliders
such as the discus or ventus which have a wet wing.

Richard Pfiffner