Manual removal is a great option for any aquatic invasive plant. Grand Lake is a perfect example. Any bulbils left behind will sprout new plants, but yes, the supply of bulbils could be exhausted over time if each new plant / sprouted bulbil is removed before it can grow into a plant and produce more. A few fragments/bulbils will be left behind no matter what you do, whether you’re removing starry stonewort, Eurasian watermilfoil, narrow-leaf cattail, or anything else. The key to success is vigilance and working within your limits. Start small and be thorough. A common mistake with manual removal of AIS is trying to tackle a population that is too large from the beginning. The crew gets discouraged by slow progress and then gets sloppy, resulting in poor results.