Sharing because I know the chemical-free crowd here will appreciate it.

We have a mosquito problem, mainly in during summer time. My wife banned the sprays and the citronella for obvious reasons (kids, pets, just being indoors-adjacent) and I'd run out of "natural" things to try.

Old farmer told me the trick I hadn't heard from anyone else: mosquitoes lay eggs in standing water, larvae take ~4 days to hatch and if you flush the water before they hatch you skip an entire generation. Do it consistently for a few weeks and the local population collapses.

I tried doing it with a bucket and a phone reminder. Failed within a week.

So I built a small auto-flusher. Two pumps (one to drain, one to refill from the hose), a water-level sensor so they don't run dry and a small timer that fires every 4 days. About $35 in parts. No chemicals, nothing toxic to the soil, no scent traps for the bees.

Three weeks in, mosquitoes in our yard have collapsed. We eat dinner outside. The kids can play in the grass at dusk again. And critically – nothing in the yard is poisoned, sprayed, or fogged.

If you've got any standing water you can't drain permanently (rain barrel overflow, birdbath, ornamental pond), this is the workaround. Happy to share parts and wiring.

by SaltArrival8522

46 Comments

  1. usernamedottxt

    This is the kind of thing you could legitimately sell mate. 

  2. That-Mountain-

    Yeah you should make a video of your contraption

  3. FFBTheShow

    I am very interested in how to build this

  4. Historical-Lie-6307

    Municipalities should take note of

  5. Master_Attitude_3033

    Have you tried misquote dunks? Supposed to be a natural enzyme that kills them but is safe for people/pets/plants

  6. Jane_Smith_Reddit

    I will like to know parts amd how to make it please.

    ETA: That is awesome

  7. AHaikuRevelers

    I am ALL in for this if you can share the parts

  8. shalelord

    Now this is a summer project im looking for.

  9. Do you have a YouTube chnl for it? Can I get parts list and plan too? Thx!

  10. Sped-Connection

    Now do it into a aquaponics system and feed the fish with them

  11. kylaroma

    This is AMAZING!

    Can we do wasps next? I know they’re pollinators, but theres tons in my area and they’re absolutely unhinged.

  12. HowardTaftMD

    Wo this is super cool, can you share the build? I’m trying the dunk buckets this year but I’d love to have this in my back pocket to try if those fail.

  13. im_just_a_girl_x

    This is incredible! I’d pay for you to set this up!

  14. doom_2_all

    What’s wrong with citronella? Is there something I’m missing?

  15. whatcrawish

    This is awesome and using science and engineering to create a nice simple solution !!

  16. BaylisAscaris

    I did something similar but low tech myself. I used to breed and sell aquarium fish, so when I did aquarium cleanings I dumped the dirty fish water in a clear tank outside in the sun. I put in daphnia to eat the algae which ate the fish poop. Mosquitos loved that tank so I’d scoop the larvae off the surface a few times a day to feed the fish. I noticed over time there were fewer and fewer mosquitos in the tank and almost none in the yard.

  17. Mr_MacGrubber

    Just FYI I’ve read that mosquitos release some chemical in water that basically tells other mosquitos that it’s a good place to lay eggs. I’ve read filtering the water is more ideal than just dumping and filling. You could basically have it circulate through some fine mesh or something so that the larvae dry out and die.

  18. Satiricallysardonic

    Please tell me how to make it. Links to supplies would help, I need specific directions lol

  19. powhound4

    What stops the mosquitoes from breeding in the stagnant water you can’t drain? Mosquitoes travel 1-3 miles from where they breed.

  20. WritPositWrit

    Thats very very cool.

    Why did you fail when you tried doing it with phone timer?

  21. I wish this could work for me, but I have a nearby large body of water they can breed in.

  22. 13thmurder

    Is that not a bunch of dihydrogen monoxide?

  23. theycallmeMrPotter

    I do the same thing but manually. I have a Google calendar marked for the rest of my life every 4th day to dump and refill 😂 this is so awesome

  24. toomuchoversteer

    I just put a bowl out with mosquito bits in it. Its passive and if you add a roof (to stop rain overflow) you only need to top it up once a week. No draining required the BT bacteria in the mosquito bits is harmless and is already found in the soil but in smaller quanities.

  25. jamatosoup

    I’m curious why the bucket of water and a phone alarm to dump every 4 days was a failure. I thought that was a decent idea too lol

  26. NoOneEver_

    You have saved my life (and likely legitimately are saving others’), this is so freaking cool and can’t wait to make it myself. Thank you so much!!!

  27. Suspicious_Button140

    Nice job. Mosquito bits-best thing I’ve found that works.

  28. Telemere125

    Dude that’s awesome. Might put something like that in at my farm (close to a swamp). Now if you could make something for gnats, that would help near my river house lol

  29. BreezyMcWeasel

    I would love to see the plans. I’ve had this same idea for years but I’ve never gotten around to building it.  

    Does it require constant connection to a hose? It so that would work for me. I was working on one that could be freestanding, which would be preferable.  

    But your completed one is much better than my not completed one. I’d love to build this. My backyard has always had tons of mosquitoes 

  30. gello1414

    Bro this is incredible. I have zero programming or electronic experience, is this still something I can make? Like are you directions in that link you posted that followable?

  31. Jaded_Cupcake5568

    That’s actually genius, you basically turned mosquito control into a low-budget engineering flex and I respect it.

  32. Craigmakin

    This could also be incorporated into a bird bath. This is really cool and I agree you should try to make a few dollars from this.

  33. mrs_adhd

    Great idea!! Is the auto flush like a dehumidifier pump?

  34. LindeeHilltop

    Please send me a kit.
    Gran’s check is in the mail. 😉

  35. jimboslice86

    how big of a yard does this serve? i would imagine they find and breed in all water sources, so this has to big and attractive enough for them to favor this over all other possible sources

  36. HighColdDesert

    Additionally, this would function as a reliable water source for desirable creatures like birds and bees, but would avoid having the birdbath breed mosquitoes.

  37. BGOTU4EVER

    2nd try…. I live in So. Oregon. Wet winters and springs. Hot, dry summers. Plus a river 150′ down across street but is moving water. Also in a neighborhood. Would this cover an acre or at least my front yard area? My Aussie pup is MDR1 positive. No heartworm meds. Problems with other meds too. TYIA

  38. wizzard419

    Is yours the only standing water in the area? We have a problem here but literally no clue where they are coming from as people are vigilant about standing water and such.

  39. Maleficent-Hurry-170

    I wonder if you could get an ancillary benefit by adding rocks or something that floats to make it a usable water source for bees and other critters?

  40. jimboslice86

    Does it just dumb the water into the grass? is the water being dumped into the grass enough to kill whatever larve is in it?

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