I have been thinking of trying to anchor a red root floater to the side of the tank away from the water circulation with a suction cup and clip, but it would still shade plants and might only work well in a larger tank over anubias plants. We have a betta log in our tank and I have been thinking of anchoring plants to it, it moves with the circulation of the water so it doesn't shade the same area all the time. Though the size of the tank always determines how things work. Maybe rooting something to a thin piece of driftwood that goes up one side of the tank? I have just found bettas to be incredibly playful and curious. Maybe other betta owners have some ideas.