Just recently got a tank (20gal) with two dalmation mollies, 1plain white Molly, a red wag play, and a sunburst wag platy, the red wag is pregnant, and so is one of the dalmation mollies, and the white molly. When we first got the tank, we had 3 Dalmatians, the red wag, 3 cardinal tetras and 3...