Welcome Kevin. I'll leave the liner stuff to those who have experience with it.
500 ft, if I'm understanding you, is a long way to run power lines. Have you considered a separate power pole for the bottom area?
It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.
Without a sense of urgency, Nothing ever gets done.
Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa
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