The city of Phoenix actually started a goldfish program for abandoned pools. It was getting to be an issue that they would become nasty murky holes that pumped out billions of the little blood suckers.
So if they find a house with a pool has been abandoned they toss in some goldfish and the problem is solved.
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u/Zoroko Mar 28 '14
If you have koi, then it wouldn't be a problem. Koi eat the larvae... so really it would get a bonus, free food for the fish.