Those are random plants sprouted by the 'betta bulbs'- these little dried bulbs you can get. They look like tiny coconuts. I just got them because I was curious what they would sprout into. The lantern is from TopFin at Petsmart.
Wow, I purchased some of those betta bulbs as well. I've only had mine for about 5 days though. How long did it take yours to start sprouting? Did you use any fertilizers? Sorry for all the questions, lol
it's no prob- the large one was in her critter keeper and the one gallon I had before I got the three gallon- the stalky one was added once I had the three gallon set up- they both sprouted the day after I submerged them- very teeny tiny sprouts- and had leaves at about 1 week. The third bulb was a dud and never grew. Which is fine since the tank looks pretty ok with just the two. I haven't used any fertilizer yet but I plan on getting some soon.