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Calcium hypochlorite, or cal-hypo, tends to be the best shock for an above ground pool. It is widely available, affordable, and powerful. Cal-hypo shock is typically 65% to 75% chlorine and is very effective at ridding a pool of bacteria or other contaminants.

The decision to install a spool yourself or hire an installer depends on the type of spool and location. If you don't have experience with installations, including excavation, plumbing, and electrical aboveground pool kits are available for purchase. Without the necessary skills for a pool install, it would be wise to hire a local pool contractor for the job.

You should wait at least six hours after adding baking soda before swimming in your pool. Even better, wait at least 24 hours to ensure it’s fully mixed in and dissolved. While it’s likely not harmful, if you get in the pool too early, the baking soda may irritate your skin or eyes if you’re sensitive to it.

You shouldn’t swim in a pool with algae. When there’s algae, there’s also bacteria that’s feeding on the algae. Also, algae-infested pool water is often chemically imbalanced, which means germs like Cryptosporidium, Giardia, and E.coli could be present. These germs can cause a range of illnesses from gastrointestinal issues, to rashes, and respiratory problems.

The best thing to do is to get rid of the algae first, test and balance the water, and then you can enjoy swimming without any worries.