The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
are you keeping them in brackish water? also, they need to come up to the surface for air. So if you have a way for them to come up to the surface, they probably won't climb the air line.
It won't hide them from the crabs, and will probably make them easier to climb, but I got a length of thin green airline that has a fake plant molded around it
It runs down one of the back corners of my tank next to the filter return
I had to put a short section of silicone tubing on it to connect it to the foam air "stone" which is really a CO2 stone
The stone is mostly buried in the substrate and screened by plants
The CO2 bubbles rise up into the filter return and get blown around the tank
And the fake plant really doesn't look too bad even though all the rest of the plants are real and none are the same species
I picked the airline up at my local Petland Discounts