According to Punxsutawney Phil, we have 6 more weeks of winter. What a bummer! #notmygroundhog.
For those of us with mesh covers, that means we’ll have to do a little more to protect our pool water from turning ugly before we open the pool back up in the spring. The easiest and most effective way to do that is to pick up a bottle of BioGuard Algae All 60 and pour it through the cover. (Only pour algaecide through. Do not do this with liquid chlorine! That will damage your cover.) This will kill algae that has started to grow, and prevent more from starting.
Also consider opening your pool early when you have a safety cover. They are mesh covers, so they do let rain water and melting snow through. This will dilute your chlorine residual and add contaminants to the pool. There is always a chance that your pool will open looking like a swamp with a safety cover if you don’t take some extra steps to keep it clean through the winter.
A good rule of thumb when you have a pool with a safety cover is to add one whole bottle of algae all 60 at Thanksgiving, and another at easter. Take a few minutes and save yourself days and hundreds of dollars of cleaning your pool in the spring.