I expect that it just took awhile to find a path from the inside to the outside. You might have to tear it out and start mover. Hate to say that.
You sound like you have the equivalent of a bucket with a hole in it.
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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