A splash of laundry bleach.
Add a bit, see if they die.
If not, add some more.
I use about a cap full in about 3 lts dog water bowl.
( I dont add enough till the dogs die !!)

H.P.


"Teddy" wrote in message
...
Hello All

I have just built a small water feature based in a 1m diameter pond. Works
fine and is very pretty but it has rapidly become a breeding ground for
mosquitos. Is there anything I can put in the water which will kill the
mossies?

Thanks

Ted