Questions and Answers about Pool Algaecide

Can my pool have excess algaecide and how can I reduce it?
Yes. If you have added too much algaecide your pool will have excess product. And the excess amount of any chemical is harmful to the environment.  Removing some water from your pool and then topping up with fresh water is one of the options that you can use to reduce the amount of algaecide in your pool. If you aren’t in a hurry to dive into your pool, then you can wait for a few days so that some amount of algaecide is lost through evaporation.
How much algaecide should I put in my pool?
We would advise you to follow the instructions provided by the manufacturer to compute the amount of algaecide you should use for your pool.
When should I add algaecide to my pool?
It will depend on your motive. Do you want to prevent the development of algae or do you want to kill algae? For prevention, you should add it after cleaning your pool. For killing, you should add it when you start to see algae in your pool.
What does it mean when an algaecide is written 50 or 60 percent?
This means that the product has 50 percent concentration or strength or 60 percent strength. All concentrations are very effective, depending on the type of algae in your swimming pool.
Source from https://trello.com/c/AH8Q0l5e/1-the-best-pool-algaecides-for-2020