Remember when zebra mussels were going to wreck everything and lead to the death of the great lakes. The main thing is not to panic and let this work out. if there's a major problem it'll eventually show it's self. I agree it's highly unlikely commercial nets are to blame. They are watched like a hawk. The spiny water fleas will go through a population explosion then die down to a norm or go away. It'll take a few years but it'll happen. That's how invasive species go.