We're in Texas and have 5 degree temps this week with rolling blackouts. Our swimming pool is full year round to keep it from being burped out of the ground. We have a freeze guard installed but with the blackouts, the power is off for hours and ice is forming. I've read that if you float wood in the pool, it will act like an expansion joint & the ice will burp it out if it freezes. I don't have any logs but I do have 2x4's. Will putting these in the pool work?
Jump in and break the ice periodically. Minnesotan up!
Seriously, walk the perimeter on a regular basis and bust the ice up with a shovel or other heavy tool. Unless the ice gets thicker than say a half inch across the entire surface it won't cause damage.
Covering it will certainly help. You have a lot of heat in the ground, so if you insulate the top it'll stay much warmer. Pull your cover over it and throw all your extra laundry on it. Dark colors absorb solar heat.
Floating a board in the water will help. wood absorbs more heat than water but the piece floating prevents a thicker sheet from forming and expanding. I am not sure how well a 2x4 will do but it will pick up heat and slow or prevent the surface from freezing solid or as thick, I haven’t had broken tiles since starting to do this many years ago.