Snrub
Actually a good idea if the fish mesh is readily available
Pat W
You can get various plastic netting/fencing in the big box hardware/lumber stores. It surely is not as good quality as regular plastic fish netting, but it is readily available. Something pretty reasonably priced for a long piece is the safety fencing used in construction to fence off areas so people will not fall into holes, etc.. It has fairly large openings but would at least keep the large fish out. I would think some netting with holes about half that size would be better though.
