I read somewhere that people use plastic poultry netting to make covers for their water lily pots to keep the koi from uprooting them. Has anyone ever tried the pond Net that keep the leaves out of the pond to cover them? Do you think the holes would be large enough for lillies to poke through? I added a layer of large rocks to the pots and the koi still managed to scatter kitty litter all over the place and uproot my plants.