Algaecides. While algaecides are pretty shelf-stable and will be viable for up to five years, we only recommend getting enough to cover you for a season and a little bit for the off season.

How long is pool algaecide good for?

When properly stored (cool and dry indoor location), pool algaecides are quite stable and most will maintain potency for at up to 5 years.

Do swimming pool chemicals expire?

The rule of thumb is that dry chemicals for your pool and liquid pool acid will last if stored in a cool, dry place. In fact, with proper storage, the pool chemicals should remain usable for years. ... For example, dry pool chlorine will not expire for a long time, while liquid pool chlorine will expire quickly.