Model # R20841-6
Alternate Part #'s LZA71428A
GLB 1 lb Super Charge Shock (68% Cal Hypo)
GLB® Super Charge shock oxidizer is 68% active Calcium Hypochlorite granular formulated especially for super chlorination shock treatments. It kills bacteria, controls algae and destroys organic contaminants in pool water.
Calcium Hypochlorite…...................... 68%
Available Chlorine 65%
It is a violation of Federal law to use this product in a manner inconsistent with its labeling.
HOW TO USE: Use only a clean, dry scoop lid to measure this product. Do not use the scoop for any other purpose.
1. Use this product at the rate of 1 pound per 10,000 gallons of swimming pool water. Add total required amount at one time. Scatter this granular product directly over the pool water surface. Use this product only when pool is not in use. It will produce a temporary high chlorine level. Re-entry into treated pools is prohibited above levels of 4 ppm due to risk of bodily harm.
2. Between applications of this product, maintain required 1.0 – 1.5 ppm chlorine residual in pool water.
I'm looking for pool shock to sanitize my drinking water. Will this work?
I have heard of people using pool shock to sanitize drinking water but I can not promote the use of any pool shock for this purpose. You will want to contact the NSF for further information.
My water is turning green. I had my water tested and it shows 5 on the total chlorine and 0 on the free chlorine, what can I do?
Chlorine in water may be present in two forms, free and combined. Free chlorine does the hard work of killing bacteria and oxidizing contaminants. When you add chlorine to water, you are actually adding free chlorine. When the free chlorine combines with contaminants, it becomes combined chlorine, or chloramines. This form of chlorine has very little sanitizing ability, and no oxidizing ability. Total chlorine is just the sum of both combined chlorine and free chlorine. You may have what is considered chlorine lock. Chlorine lock can occur in swimming pools where the chlorine in the pool is rendered inactive, even though you may have a total chlorine reading in the pool. In essence, a chlorine “block” means that the chlorine in the pool is literally being blocked from doing its job by other chemicals. The quickest way to resolve a chlorine lock issue is to partially drain and refill the pool.
Can I add shock through my automatic chlorinator?
No, you should never add shock through an automatic chlorinator. Never mix different types of chlorine. Pool shock can be added to a bucket of water and poured directly into the swimming pool.
I have an in ground pool with a mesh winter cover. Several weeks ago, I had added 2 gallons of chlorine to the pool. Since then, with the mesh cover still on, the water has turned green. I've been adding about a gallon of shock each week without improvement. Should I continue adding shock to the pool or should I wait?
I would recommend waiting until the pump and filter are running again before adding any more shock to the pool. Algae needs two things to grow: food and light. With a mesh winter cover, the algae has more than enough light to grow regardless of the shock that you're putting in. Also, shocking the pool without circulation can cause bleaching of the pool surface
My pool company recommends using a phosphate remover. Do you have any such item?
(4 out of 5 stars) Get ready for economic collapse :)
Reviewed By: Mike from MA ()
Purchased this product for drinking water purification. Good price for what I was looking for. Make sure you know how to use this stuff if you're planning to use it for drinking water.
(5 out of 5 stars) Clear as crystal
Reviewed By: Robert R. from San Diego, CA ()
Pros: water clarity
My personal standard for water clarity is my dime test. I have a dime epoxied to the bottom of the deep end of the pool. If I can clearly see the face on the dime, then the water is clear. Zappit Pool Shock gets the job done using less shock than other brands. Costs less, too.