While many pool professionals are at ease with the regular use of liquid chlorine, there is a large contingency of pool operators that rely heavily on trichlor, and are currently in a quandary concerning both scarcity and increased prices. Granular chlorine is one answer, but by all accounts, supply is becoming limited with this option as well.
Apparently, there are few available short cuts anymore and for many, the main solution will probably involve getting comfortable with liquid chlorine.
Here’s a quick guide: To prevent common algae, many industry experts recommend maintaining a chlorine level that is about 7.5 percent of the cyanuric acid concentration. It is further recommended to maintain cyanuric acid levels at between 30-50 ppm.
That translates into a chlorine level of between 2.25 and 3.75 ppm, depending on the CYA level.
Pool grade liquid chlorine comes in a few different concentrations, but 10 percent and 12 percent are common. Adding 12.8 fluid ounces of 10 percent liquid chlorine to a 10,000-gallon pool will raise the available chlorine by 1 ppm. Adding 10.6 fluid ounces of 12 percent liquid chlorine to a 10,000-gallon pool will raise the available chlorine by 1 ppm.
Depending on the pool volume and desired chlorine concentration, these numbers may be easily scaled up by the appropriate multiplier.
Liquid Chlorine from Hasa