Guppies in the drain,mosquitoes killer !

Noted on a drain near changi airport ,it was full of water and movements.On looking closer,noticed that it is full of guppies, and tadpoles.Good sign, this means the mosquitoes larvae are under control.This should apply Singapore wide.Guppies in the water means no larvae.Chemical in the water means it will finally enter our water supply via the Marina Barrage, in the end.Think of it.24/7 mosquitoes killer free and green.Its time the NEA takes noticed and the PUB too.