I added my packet of hth to my small pool, but before I noticed and was already outing the packet, the hth was the dark yellowish-orange color. Now the pool is, so I tested it and the chlorine was low and I added 1lb of shock with running the filter pump. It’s still discolored. What should I do at this point to diagnose my pool's discoloration?
You could be having mustard algae that appear yellow in color and not metal stain.
Low chlorine encourages algae growth. As such, all you need is lots of chlorine. I prefer you to use liquid chlorine.
Raise free chlorine level to 12ppm and maintain it thereby adding chlorine when it drops to 8ppm at least twice a day until you get rid of algae, it could take a couple of days to get rid of algae.
Updated on May 11, 2020
By Barack James