I have a 18\’x42\" intex swimming pool.
Usually, I pump water out at fall and fill the pool again at spring.
May I leave the pool with water till spring and just the replace water?
The reason that it is recommended not to do this is because the expanding ice can cause damage to the thin pool walls when freezing conditions are present. However, many above ground pools are "closed" for the winter with water in it and this closing procedure may be appropriate for your pool. Check with a local pool dealer to see what they recommend as their experience in your area is very helpful.