The
SLAM Process with liquid chlorine is the answer.
Slam level for your cya of 40 is 16ppm.
Liquid chlorine only adds fc & a little salt.
Cal hypo adds not only fc but also calcium to your pool (& whatever else is in the kind u have
) you didn’t list your current ch or pool type so its hard to advise on that.
Clarifier & other potions will only gum up your filter.
Be sure to Clean/backwash your filter when pressure rises 25% over clean pressure.
Which should I buy? TFP's recommended pool chemicals are cheap, easy, and won't unbalance your pool water.
www.google.com
These pool chemicals should not be added to your pool. Save your money and frustration and avoid these chemicals!
www.google.com
Filling out your signature w/ all your pool details & test kit will help u get some more specific answers.
www.google.com