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Joined: May 2022
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New pond, getting ready to stock with Sunfish. I currently have aeration and pump moving water, but thought extra mosquito protection? Any opintions on the Dunks?

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I would be concerned treating with dunks would be a waste. The water depth may be to great for the active ingredient(s) be concentrated enough to provide effective control. If they were to work I would be concerned as to what was happening to beneficial insects. This type of product is meant for water without fish (think puddles and pots). Mosquitos are much less prevalent in waters where fish are present. Once you get fish going in the pond most of the mosquitos you see will have come from nearby puddles and wet boggy soils.


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I agree with jpsdad - trying to kill mosquitos with dunks is not wise for at least a couple reasons depending on when you will be adding fish. 1. the pond volume of water will require a really high amount of dunk donuts - likely expensive and probably wasted money. One dunk treats 100sqft but at what depth??? Dunks active ingredient is a bacteria specific to mosquitos. I would like to read the tests performed for that study. Money would IMO be better spent on adding more minnows who love to eat mosquito larvae. 2. Dunks due to their purpose have a bacteria additive that no doubt has a fairly long residual time in the water. Dunks at high enough concentration in my mind likely do kill other beneficial types of micro-invertebrates especially all types of sensitive zooplankton which is and becomes a very beneficial food near the bottom of the food chain for new small fish. 3. Normally a new pond without fish and nearby local pond habitats have natural populations of invertebrates such as dragon flies and damsel flies as insect predators that eat mosquito larvae and adults. Adult dragon flies form local habitats will be visiting the new pond to lay their eggs for dragonfly population establishment. Visiting adult dragon flies eat lots of mosquitos. 4. Mosquitos have been documented to travel one way or another (probably mostly wind) up to 50 miles from origin, thus most of your mosquitos might not have originated in your new pond. 5. As soon as you add new small fish to the pond they will prey very heavily on any of various stages of mosquito larvae present and due to mosquito life habits are very easy for small fish to capture.

Last edited by Bill Cody; 08/09/22 08:43 AM.

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Once the sunfish go in you wont have to worry about the mosquitoes from your pond and, in fact, would be reducing the available food for them by adding the dunks.

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Originally Posted by lmoore
Once the sunfish go in you wont have to worry about the mosquitoes from your pond and, in fact, would be reducing the available food for them by adding the dunks.

Good point.

There is also a fair chance that the pesticides in the mosquito dunks could kill some of the other types of insect larva that are part of the pond food chain.


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