The anti seep collar is a pretty big deal regardless of what you choose.
Also, take a look at an emergency overflow for either a stopped up pipe(it can happen) or a 100 year flood. If possible, it should be over natural ground instead of packed dirt.
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
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