I have a lot of jumping wrasses too and went the
mesh screen route. Works great and have not lost a single jumper since installing it. I also borrwwed a PAR meter to test any loss of light and didn't measure any loss on the PAR meter. Also no salt creep on the screen either.
It's a easy DIY project that can save lives! Heck, if you buy the materials I will gladly spend the 30 minutes to build one for you!