I would only try it in the country ... here in Taipei it would mean instant death to the fish with all the pollution
If you're planning on staying there for a while, why don't you invest in some guttering (collects water from the roof) and a water tank (holds the water). This way you won't have to worry about getting anything in the water while you're collecting it, and you'll also get a much larger volume of water.
If you wanted to get really organised system, you could run a trickle system straight from a tank collecting water from the roof, but above the height of your tanks ... it wouldn't even need power!
Just my 2c...
JB