This is my very first backyard rink attempt, and I build it before I found this wonderful forum. Therefore I didn't put much thought in what color the liner should have, so I took the only one which was large enough at my local hardware store, which was green..
So.. should I flood the rink and get a new white liner before the water freezes (it's about 6C here in Oslo), or will the green liner suffice for this season?