My husband being the sweetheart he is bought an aqua fern for me at petco... It's not unreasonable to think that something called aqua fern goes in the aquarium, right? I find out that it's a terrarium plant! My question is now, do I plant it in potting soil like a regular houseplant(it is quite pretty) or do I find a shallow dish, and plant it in gravel like bamboo? I would like to get my money's worth out of it!