Up to 12 - 15ppm is fine, as long as you do it properly. Shocking a pool takes a bit more chlorine than normal so therefore, it will take a bit longer for your pool to adjust. Clarifier can help clear the water, as can running the filter non-stop. I use Polyquat 60 that comes in quart bottles and add about 4-6 ounces per week. Pool algae growth can be controlled with algaecide, but to kill algae and clear the pool, we use pool shock. Be sure that the pH is adjusted to 7.1-7.3 range, so the chlorine shock is most potent. Make sure to also brush as much debris and algae buildup as you can off the pool sides before starting. We always want to follow the directions on the bottle, but this quick list will get you going. Shocking your pool, or super chlorinating, is a cleaning method designed to keep your pool water clean and safe by adding three to five times the normal amount of chlorine. Adding Natural Chemistry’s Pool First Aid helps remove the dead algae from your pool and it’ll make your water crystal clear. Make sure your pool water is balanced. If black algae is present, brushing the algae at least once daily will also help expedite algae removal. Copper compounds are very good for a vast array of algae types and will give you long-term algae prevention after the algae has been killed (up to 90 days). You can use algaecide more frequently as long as you do not forget to add some after shocking your pool. Adding the Shock Chlorine at night with pool light on gives me a reliable feeling that I am applying and broadcasting the Shock in an appropriate manner covering the surface area of the pool. Depending on the severity of the algae, 10-30 ppm is needed to kill active algae blooms. After the third dose of shock, wait 12 hours and then turn your pump off. The algae will return in a short amount of time and you will have dissatisfied customers. Wait a few days after shocking. Removing Algae Blooms. You can go to these pages to learn exactly how much you need for a good shock to clear up your algae: Swimming Pool Chlorine Pool Shock You always want to go a little higher when shocking your pool. Brushing the dead cells away makes the living algae more vulnerable to the algaecide. Wait another 12 hours and then add a third equal dose of chlorine shock. If you can drain and refill part of the pool quickly, that will help and also save money on shock, to dilute with fresh water. You don't have to mix the algaecide in a bucket of water, you can put it directly in the pool. As a result, how long after putting chlorine in a pool before you can swim is going to be longer. Leaving debris in the pool can mess up your chemical testing and make the shock process less effective. You should routinely shock your pool to keep it clean. This drastically raises the chlorine level in a short period of time. How To Use A Pool Algaecide Adding a quality pool algaecide to your pool is fairly simple. If you need to, first shock your pool, then allow the chlorine level to decrease to an acceptable level. Choose an algaecide that is right for the situation. Exactly how long you must wait, there are usually several factors you need to consider before coming to that conclusion. Depending on how long the pool has been stagnant, there may be a lot of debris that needs to be removed before any other steps can be taken. Algaecide is for prevention, don’t add right after shocking, the shock will destroy the algaecide and waste it. Shock treatments are done every one to two weeks and are accompanied by algaecide. Adding algaecide during algae's best growth time will increase intake of the algaecide and make it more effective. Your pool to adjust for your pool one to two weeks and are accompanied by algaecide and add about ounces... 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