I am down at least a foot ..... but i do have water underneath the ice.
Any chance it could be from evaporation?? I googled it and found one person who said he loses that much every winter and there is no leak once he fills it back up .... i know that is a longshot and i most likely have a leak.
Should i refill it and see if it drops down? Assuming it drops to the same level then that is where i start looking?
Would expansion of the ice potentially cause an issue?? I know it is tough to troubleshoot this stuff site unseen but i want to get started. We have rain and above freezing weather and i want to get started now.