I'm trying to decide whether to flood today or wait until Saturday. Temps here are forecast to be: Today (Wed): 3C Tonight: -2C Thursday: -4C Friday: -2C high, -6C low Sat: 4C high, 1C low Sun: -3C / -9C Mon: -6C / -10C This is my first rink, small backyard, very little sun exposure. Do I risk it an...