thank you for all your support and remedies. We will try the roundup. We will keep at it as long as it takes.
Don't try the roundup, it's not labeled for use on a pond. There are other glyphosate products that are labeled for such usage, such as SHORE-KLEAR or something similar. Make sure that the product has surficants in it or add the appropriate surficants. The surficants break down the plants protective waxy or oily coating, allowing the herbicide to be absorbed.
