Snails!

[lily99]

So now that I have a terrerium I bought a warmth tolerant masdie. It seems healthy, but so far I have pulled 4 tiny snails out of its pot. It is potted in spagnum moss which probably gives the snails a nice, moist home. I need to get rid of them before they start eating my orchid. I was thinking of submerging the pot in water so they have to crawl to the surface, but I am concerned about the plant getting too wet. If I repot, is there something I should put on the roots in case there are eggs stuck to them or hiding snails?