You can find what you need at the pool store, possibly at a big box store with a pool aisle, even some home improvement stores if they have a pool section. They may call it stabilizer or conditioner. You want the highest percentage of cyanuric acid possible.
if it's a fine powder, should I still use the sock method to introduce in the pool? or can I mix with water the put in pool, or can I simply just spread around the pool evenly?
Still put it in the sock, or since you have a cartridge filter and if you're sure you won't need to clean it for at least a week, you can pour it slowly into the skimmer.
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!