everyone gets them, they like water, they almost make a game out of the whole catch and destroy routine.
The net works well, that's actually how I get most bugs etc. out.
They tend to live through shocking too.
My neighbour had one the size of a quarter when he opened his pool, I told him that whatever's growing in his pool, this thing obviously likes it, it was probably 10 times bigger than the ones I catch in mine.