Use Baquacil... less intense chemicals, and MUCH harder to mess up. I've been using it for years. You can use Baquacil and shock your pool, and it's safe to swim in after 4 hours, instead of the 24 hour turnaround with chlorine. It's good stuff, and better for you all around. Less chemicals to irritate skin while swimming and while cleaning.

That reminds me... I need to start opening the pool lol. Little late getting on it this year... I usually get started in April. It's just such a pain lol. I have yet to remove the cover without dumping half the leaves on top of the cover into the pool.