1-5ppm
Cl is an abbreviation for "chlorine" you should check free chlorine and total chlorine for comparison.
If the chlorine level is correctly maintained this should not be a problem.
If you are getting a low reading of chlorine in your above ground pool, you should add the appropriate amount of chlorine to get it back to the correct level. This is important to keep your pool running at maximum abilities.
You only need to shock the pool if there is visible algae, or if the ppm of total chlorine is higher than the ppm of free chlorine. Generally, a level of 2-4 ppm chlorine is all you need to keep your pool sanitary. Let the level drop to that on its own, or use sodium thiosulfate to drop it quickly if you notice itchy skin from excessive chlorine.
The free chlorine in the pool should be maintained at 0.1 to 3.0 mg/l the Ideal is 2.0 MG/L
my free chlorine level is way to high above ten my pool is 12 by 24 what can i do to fix it
No it isn't good. You are having trouble breathing to begin with and the high level of chlorine in a pool is not good to breath.
Use stabilized chlorine only so long as stabilizer level (cyanuric acid level) in pool is within the recommended range of 50-80ppm.
The 3rd energy level is the highest occupied energy level for chlorine with seven electrons.
yes, the algae feeds on the chlorine.. must get rid of algae, then bring up chlorine level
Chlorine level should stay between 1.0 and 3.0 parts per million (ppm) to maintain a healthy pool.