Just ordered some moss seed. Cross your fingers. It says it likes moist well drained soil, full to partial light. Sowing instructions say to sprinkle on soil and keep moist until germination. Sounds perfect.
I've had the same problem with transplanted moss, it didn't last more then two months. But I love the color and texture of it. I think I'll try the seed in a tank and see how it works too. I love that site, thanks for putting that up!
This place has been great for posting links to some wonderful sites I've never seen before to buy some really neat stuff.
I would say it all is going to depend on your lighting. If you are running typical flourescent fixtuers, I doubt it will survive. If you are running vho, ho, compact flourescent, or even metal halide, you will have a better chance of it surviving. Good luck, I have killed a couple pots of irish moss in terrariums. It looks nice before it dies though.
I am currently growing some Kyoto!?! moss right now and so far I have not seen a big growth rate. I have read that it takes anywhere from 6-8wks to get the spores to grow. So you want to be patient with moss. Also I have ready that you want to use spring or distilled water for the moss. The regular tap water usually has high levels of metals that are death to moss. Give it a shot and keep us posted