Specialty Gardening: How Cool!, 1 by Lala_Jane

Lala_Jane wrote:
But will it hurt anything? This just popped up overnight and I think this looks great! I love the pretty yellow color especially beside the bright pink Alternanthera, but I want to make sure it's not going to bother any of the plants. I'm fairly new to terrarium gardening, but I should imagine some of you more experienced folks run into this from time to time. Should I leave it? Will it multiply or will it eventually just die?

Thanks for any tips or info,
La