Homemade TankDivider/Breeding Nets

#1
I'm somewhat new to the whole fish thing, but I'm just wondering if using a window screen as a tank divider or breeding net. I have a 10 gal tank, UG filter, 1 algae eater, 2 neon tetras, 1 female fancy guppy, 1 male double swordtail. Will the screen contaminate the water? ( Ithink the screen is metal, cuz they make plastic ones)