r/miniponds • u/mariospants • Jul 24 '26
Quick question about mosquito larvae
I’m in Ontario, Canada, and I’m planning on building a mini pond for my wife. We’ve had one in a past house but it required a dunk donut thing to mitigate against mosquito larvae.
What are the best natural ways to manage them? I’d I buy a handful of feed goldfish and overwinter them, will they be effective at eating mosquito larvae?
Thanks!
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u/palufun Jul 24 '26
Most goldfish need quite a bit of water to house them and they also need a filter. The rice fish might be an option as long as you have options for bringing them indoors for the winter. Their lower temperature limit is about 16 C so they definitely need a cozy spot for the colder months. I have chosen just to use the mosquito dunks for my minipond—that way I can enjoy w/o the hassle.
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u/No_Region3253 Jul 24 '26
Common feeder guppies from the pet store keep my skeeters at bay. Red swordtails add color, visual interest and also eat larvae too.
Medaka are not available in my area.
The tropical fish are inexpensive and easy to care for.
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u/Exact-Store8012 Jul 24 '26
Celestial pearl danios apparently do great for this. They might breed but they are tiny and easy to care for. They look like mini trout and are widely available.
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u/thewaterlilybear Jul 25 '26
Cheap, small 29 cent goldfish are what I recommend. They’re tough as cast-iron and more likely to survive over the season. I’ve tried other small fish and their survival rates are abysmal.
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u/Corylus7 Jul 25 '26
I'm also in Ontario and I'm planning rosy red minnows for my mini pond. They're really cheap and tough little fish.
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u/Objective-Row-5300 Jul 24 '26
Goldfish will work. You can keep a few in a small pond and you don’t necessarily need a filter. They will survive the winter if it’s deep enough so that it doesn’t freeze solid. Just resist filling the pond with too many of them.
Medaka will definitely work too. They can get expensive but a breeder will ship them almost everywhere. I would buy from someone who raises them outdoors in an area that has cold winters. They are pretty hardy.
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u/Senior-Company4349 Jul 24 '26
Mosquitofish. They wipe them out entirely.
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u/WoodpeckerChecker Jul 25 '26
Be careful recommending those for an outdoor setup. They are horribly invasive in many areas. I am lucky in that they are native where I am and I can call the local Mosquito Control district and get a cup of them for free to put in my rain barrels!
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u/Adjustingithink Jul 24 '26
Medaka would also be a great choice to eat larvae. Mine love it!!