Stagnent pond

[Edd]

Hi
I had a pond in my garden ,quite small about 5' by 5' ,in the spring it was looking great with lots of frogs and tadpoles and even a palamate newt ,but in the autumn it went stagnent and there were lots of mosquito larvae so i drained it.
Im filling it up again but im not sure how to avoid the same problem again ,i would like to have insects in the pond like water boatmen and damselfly larvae etc. ,but how do i avoid the pond going stagnent again.

[Dogghound]

Plenty of plants, particularly oxygenators like pond weeds. Also try and scoop leaves out when they blow in, they stagnate small ponds when they build up. Have you done any work in the garden near the pond?