I started using Algaedyn two years ago and was blown away by its effectiveness. It was so effective that the only reason I needed to chlorinate the water was for sanitizing it. I could let the chlorine level go to just about zero and there would be no hint of algae.
Last year I repeated its use and it was not quite as effective. This year even less effective. I cannot for the life of me figure this out.
I have an 18,000 gallon pool and the rate of use for Algaedyn is a quart/20,000 gallon pool. I used 1 full quart for the initial treatment and have since run through more than another quart with additional treatments. I keep the chlorine at acceptable levels but the pool has green algae.
At $100 for 3 quarts I need this to be more effective. Any thoughts would be appreciated.