Re: Substrate in drainage layer
Yeah, this is why I put either a drainage bulkhead or a stove pipe of PVC where I can reach down in with a piece of tubing. I also put a bead of silicone all the way around my fiberglass divider so that the substrate can't down into the drainage layer. Sorry you are having an issue but a re-do would allow you to make sure that it doesn't happen again. Also, I don't know a whole lot about reptisoil, but I am not sure it's the right substrate (all by itself) for a dart frog viv. Maybe it could be used if it was mixed with some other components. If it is getting "muddy" when it gets down into the drainage layer, it might also do that when it gets wet when it's above the fiberglass screen.
Hope you find a way to fix it to your liking,