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How Do I Reduce Mosquitoes Around My Pond? – Pond & Lake Q & A

Picture of a Mosquito Close Up.

Pond & Lake Q & A

Q: I get a lot of mosquitoes. Are they coming from my pond? Is there anything I can do you to do to get rid of them? – Wendy of Ohio

A: There nothing worse than getting attacked and annoyed by mosquitoes. It’s hard to sit back and relax by the pond when swatting at mosquitoes! Well, like most topics I write about, I always like to start with the cause of your problem first.

What Causes Mosquitoes: Two words: Stagnant water. That’s right, any stagnant or standing water can be come a breeding ground for mosquitoes. And unlike the last few years, most of the country has had a wet spring, so expect mosquitoes to be a problem! The majority of your mosquitoes come from low areas, unclean gutters or any where water is allowed to collect and sit stagnate. A pond in most cases is not a great spot for mosquitoes to breed, especially if there is an aeration system or fountain
present. The constant ripples caused by an aeration system or fountain will make it very difficult if not impossible for mosquitoes to breed. Although, however, if your pond shorelines become overgrown with cattails or other emergent plants, they will block the rippling effect from an aeration system or fountain, thus contributing to mosquito growth.

Reducing Mosquitoes:

Use Mosquito Dunks® & Bits® to Reduce Mosquitoes:

  • Mosquito Dunks® are donut shaped and are simply placed on the water’s surface. Each dunk can treat 100 sq. ft.. Dunks are great for small ponds, water gardens and birdbaths.
  • Mosquito Bits® are recommended for a pond or lake. You just simply sprinkle the bits around the shoreline or any where the water is still. With Bits you don’t have to treat your entire pond. 1 oz of Mosquito
    Bits will treat up to 125 sq. ft. for 30-days.
  • Note: Mosquito Dunks® and Bits® are not recommended for ponds that are used for drinking.

POND TALK: What do you do to keep mosquitoes at bay?

12 Responses

  1. Thank you so much for all stuff… I actuallyappreciated this, but would you give more points?

    • Pozycjonowan,
      I hope you find this additional information helpful in understanding mosquitoes.

      Female mosquitoes like to lay their eggs in quiet water or along the shoreline where plants may be in the water or overhanging the edge of the pond. The eggs float on the surface and hatch into larva in about 48 hours. It takes about 10 days for the larva to develop and then it will change into a pupa. The pupa also floats on the surface and in approximately two days the adult mosquito will emerge. Mosquitoes don’t require a lot of water to lay eggs, but the more water the larger the area for mosquitoes to breed.

      In larger bodies of water removing floating vegetation, algae mats, overhanging vegetation will help to eliminate breeding grounds. Frogs, Dragonflies, bats and larvae eating fish are all natural predators of the mosquito larvae. Examples of fish that will feed on the larvae are Koi, Goldfish or Mosquito Fish in a smaller Water Garden Pond and Bass, Bluegill or Catfish in the larger bodies of water. So, keeping your fish a little hungry, by not overfeeding, will encourage your fish to use the mosquito larvae as a food source.

      Once again, aeration in any body of water, such as waterfall, fountain or aeration system will not allow the water to become quiet and stagnant. This coupled with natural predators and a little pond maintenance will help to keep the mosquitoes to a minimum. For a little extra help to gain control, use Mosquito Dunks or Mosquito Bits.

      These products are not recommended if the water is used for drinking.


  2. Mosquito fish are not allowed in Michigan,…. but just about any kind of fish will stop the breeding problems of Mosquitos. We put in blue gill, sunfish, perch, bass, catfish and minnows,….and our Mosquito population seemed to drop to zero overnight.

  3. […] How Do I Reduce Mosquitoes Around My Pond? – Pond & Lake Q & A – Week Ending May 23rd Pond & Lake Q & A Q: I get a lot of mosquitoes. Are they coming from my pond? Is there anything I can do you to do to […] […]

  4. Why are my goldfish brown and not turning orange? They were hatched last summer and they are still brown. I can see gold in them. How long does it take?

    • Linda,

      Good question, from my knowledge of goldfish, some of them are born black and will change colors 6 – 8 months later (sometimes much longer). I read an article quite a while back where it took a few years before the goldfish turned colors.

      Either way, it is completely normal for a goldfish to change colors.

  5. I was glad to read the Q&A today. My husband has been telling me I have too many fish in my pond. I beg to differ. My pond is small, 165 gallons, with 10 fish 6″ to 8″ each. The rule of thumb was allow a gallon of water per each inch of fish. (That was aquarium talk) Why not a water garden also. Therefore I feel I am safe with room to spare. I feed sparingly two to three times a day and have algae eaters in the pond to eat any waste. Plus I wii remove it with a net when time allows.

    So how many errors am I committing?

    I have no algae problems and right now my water is crystal clear. I do however have a green moss -like growth on the sides of the pond that the fish eat and is stuck like glue – not floating around. Is this beneficial? What is it and does it mean my pond is balanced or in trouble? I have no mosquitos because I use aeration and have a ton of Purple Martins within a few feet. My fly problems is diminished also. (Amen!)

    Thanks for your help and info.


    • Lois,

      The rule of thumb that I’ve used quite often is 1 fish for every 10 sq. ft. of water. This is a conservative rule of thumb, but it works. But again this is a rule of thumb that changes based on the filtration system, # of aquatic plants, whether you use natural bacteria or not. That sort of thing.

      I’ve seen big ponds with thousands of koi, a massive filtration system and clear water, but i’ve also seen a smaller water garden with 3 small koi, no filtration system and green water. So it all depends.

      The green moss is probably string algae. A little string algae isn’t a bad thing at all, its when it over takes the water garden where it can pose an issue.

      Hope this helps answer your questions!

  6. I agree, clean and moving water in a pond is not a good habitat for mosquitoes. To control mosquitoes you need to prevent them from breeding. So eliminate or reduce all things that will collect water nearby. I have found out that spray washing all sides of the house with diluted chlorine and few drops of dishwasher detergent (i.e dawn) helps in reducing bugs. Maybe they have less decaying matter to eat.

    If you have a serious mosquito problem, think about getting a Solo 450 motorized fogger/mister, a chem suit and mask, and some pyrethroid based pesticide (from the chrysanthemum flower). Then AFTER SUNDOWN, fog all around the house and the boundaries of your lot; BUT AWAY FROM THE POND. NEVER SPRAY ON A POND WITH FISH AND WILDLIFE. Keep all pets indoors. This definitely worked for us. We enjoyed bbqs and gardening after this.

    (PS: Why after sundown? Because butterflies, bees and good bugs go home and are not flying around while the mosquitoes that want to bite you are out in droves ready for the killing.)

  7. What about mosquito fish? I use these in a few ponds and they seem to help. I also give them to local farmers for their livestock ponds as I always have enough to share.

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