i have the betta bulbs- they look like this
that pic was taken a few months ago- they've grown out a bit. I got two different plants from bulbs that looked alike. I haven't given them plant food but they still grow just fine- i suppose there must be nourishment in their bulbs. The roots are strong and go down into the gravel. They need some sunlight- the window faces north and I keep the shade up during the day so they get some, but I have to make sure to leave it up on weekends when I go out of town because the one weekend I left it down the plants almost died. The stalks and leaves turn brown and wilt once in a while- I just reach in there and trim them so they don't clog the filter.