It doesn't matter what the size of the water is when considering the effort of removing 1,000 fish.

Catching 1,000 fish in a puddle will take the same time as catching 1,000 fish in the ocean, within reason....if you're doing it by fishing.

But like I said before, if you want it bad enough, go for it!!

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."