The stuff grows too fast to get rid of it completely. This is bad news. There was a post a while back that had some photos of Caddo and how bad it was a few weeks ago. The area the photos were taken was essentially open water earlier in the year. You can't run your boat through it without clogging the water intake. Ask me how I know
The biomass this stuff adds in terms of sediment is a big problem too.
The Greater Caddo Lake Association is running a greenhouse that is raising the Salvinia weevils and would love to have any donations. The learnings there can be useful for Lake Fork too.