You're adding a GALLON of muriatic acid every week to a 24,000 gallon pool? That's pretty unusual. I think you need to test your water -- not with strips -- and see if it's OK.

But, to your question: whether you can cover it and let it go all winter is pretty doubtful. If water temps stay below 65, you *probably* can (but I don't know), if you make sure it's cleaned and shocked before covering.

Maybe someone with experience closing a warm water pool can comment.