You guys offered great help with my initial question. Hope you don't mind my asking another one. Does anyone have any experience with "betta bulbs"? Essentially, they're pre-packaged plant bulbs that are "meant" for a betta's bowl. Apparently, you just drop them into the aquarium and wait for them to sprout. Out of my pack of three, the largest bulb is sprouting, one refuses to sink, and the last has developed some whitish stuff on it. Any tips or comments from those more experienced with these bulbs than I? What should I expect from the last two that don't appear to be sprouting. FYI: I just planted them on Saturday.