Pond Boss Forums POND CONSTRUCTION Renovating a Pond or Lake? New property, old pond. What to do?

45ACP,
FireIsHot gave you the possible solutions on 11/23/20. You just needed to click on the Salvinia link he provided and then Management options. Here it is for your convenience. It sounds like chemical control is your best option even if you tried to rake/seine your pond. I hope this helps.

https://aquaplant.tamu.edu/management-options/common-salvinia/