POOL BUILDER IN SOUTH JERSEY DISCUSSES CAL HYPO ON VINYL LINER POOLS:
Calcium Hypochlorite, or cal hypo, has been a staple of chlorine water sanitizing for decades and decades. However this South Jersey Pool Builder believes there is too much use of cal hypo for pool water sanitizing. It does provide excellent water clarity while destroying contaminants in pool water, such as those found in sweat, urine, and windblown debris.
You can buy it in slow dissolving tablet forms, or more rapidly dissolving granular forms. When added to a pool, PH, alkalinity and hardness of treated water may drift upward. The relative amounts of effectiveness will depend on the PH of the pool water. So always keep your PH between 7.2 and 7.6
Cal hypo is a strong oxidizer that requires proper attention to the manufacturer’s instructions for application, storage and handling. It can be toxic if mishandled! It can be dangerous as it is very corrosive and if improperly handled or stored improperly it can even explode and cause toxic gases.
Cal hypo comes in varying strengths; 65 percent up to 80 percent. It has been used as a disinfecting agent in swimming pools since 1928.
As the name suggests, calcium hypochlorite contains calcium. When cal hypo is used it is adding calcium hardness to the water each time cal hypo is added. This can eventually bring the calcium hardness level up too high. This would then require means to lower the calcium hardness, such as partially empting and re-filling the pool.
When it comes to vinyl liner pools, this South Jersey Pool Builder would much rather use Di-Chlor or lithium to shock and sanitize vinyl liner pools. They mix easier and do much less harm to vinyl liners. They will not bleach the liner as much. But they will do an excellent job of sanitizing the pool water and give good clear water to swim in, if the amount of chlorine is kept between 1 & 3ppm.
Questions call Rich at: 609-313-0300