Full Chemical Stabilization
At the end of every season it is important to not only check the chlorine and pH but also the total alkalinity, calcium hardness, and cyanuric acid. These do not change as quickly as chlorine and pH but if they are not in balance your pool could go GREEN! Chemistry is a very important part of the pool triangle (Pool Triangle – Flow, Filtration, Chemistry), ignoring these other values would not be wise.
Putting your pool away dirty is not a good idea, leaves and dirt can cause staining or algae growth. Consider scheduling a cleaning a day or two before your closing to make sure that it is spotless when you close.
If your cover is getting old or we have a very warm winter it is not a bad idea to check the pool at least one time over the winter. This is an opportunity to drain out a little water, check and balance chemicals, and make sure you will be ready for spring time.