Hi, welcome to TFP! Please edit your signature to include information about the pool such as pool type (above ground or in ground), surface (vinyl, plaster, or fiberglass), size in gallons, pump brand and horsepower, filter type (sand, DE, or cartridge), filter brand and size, and any water features, cleaning systems, and if there is a spa (attached or detached). Also please include that you are on well water or under water restrictions if those conditions apply to your pool. It will show up at the bottom of everything you post and it is easier for us to help you if we don't have to search the thread for this information.
Have you used any copper based algecides? Do you use well water to fill the pool?