Thanks for this informative site and forum. It's been very useful in helping me get going with my rink.
I'm in Chicago and I just recently completed a backyard rink for the first time. It's an urban rink (20' x 32') so it's a postage stamp compared to others I've seen. It's sitting on a slab-on grade concrete. There's a little bit of slope on the site, about 5+" from shallow to deep end. I did a single fill with about 8+" of water on the deep end and 2+" towards the shallow corner. The temperature has been below freezing four straight days with nighttime temps in the teens. The ice surface has turned out very well, few imperfections and pretty clear. The shallow end is frozen solid but the deep end has about 4" (measured at the corner) of ice and 4" of water under it. Should I expect the rest of the water to freeze solid and do I need to have all 8" freeze solid before I can use it?
Thanks.