Monday's side event at the SBSTTA meeting of the CBD by the pet industry gave an impressive insight how to deal with pets and ornamental plants becoming invasive: Simply tell consumers not to release them.
Or even better: put up posters in shops and print a line on the bag in which you buy your fish or pond plants and all will be solved.
Don't bother involving academics or even the governments - retailers are the best people to talk to consumers, and they are already used to put up posters and hand out flyers.