Dye checking a pool may be tough now, unless you have a wet suit (or a dry suit, if the water is below 55 degrees).

As far as dealing with ice, you'll have to talk to Carl or someone else. I have limited experience with AG pools, and with ice in pools. We've had mild winters for the last 10 - 15 years, and I wasn't in the pool business, when we had the zero-degree weather I remember from my childhood and teen years.