Don't feel bad, I secretly want the plastic ones. (I've been wanting them to put with my angelfish, since their plecostomus is set on destroying them.) But I'm oh so cheap to buy them. Besides, I bet they can hold magical water cleaning bacteria.
An awkward marimo story:
I think I cooked my first marimo alive. I had a small apartment, with a wall of windows. However, these windows, for whatever horrible reason, faced the sun. My bedroom was about 100 degrees on one side, and 60 on the other. Being that I'm an idiot, I kept the marimo by the window, where it probably cooked to death. He started falling apart, and I decided to move him. Since he was falling apart, I didn't clean him. Then he got moldy or something horribly terrifying. He never really came back.
For whatever horrible reason, I still have it, alone in its vase. X___x
...This was years ago. I really need to throw that whole thing away.
If you keep one alone, clean them weekly. The smell will become horrible. ...They seem to self clean for the most part in an aquarium though. Also... don't cook them. (Most people I've known keep them alone as pets and keep them on their desk as a souvenir from Hokkaido.)
Actually, thinking on it, my healthiest one is in the cool, darker tank. So, they probably would be happy with axolotls. Which makes sense, since I'm fairly certain Hokkaido is a cool place.
...Here's a frog rolling on the real thing. (Not an axolotl, but hey, he was the only one ready for the photo op.) ...And no, that's not a huge marimo, its a tiny frog.
:ufo: <--- marimo flying a spaceship.