I can say this....the use of the aqua finesse pool care tablets this season has resulted in the most successful season I've had in years (in terms of not having problems with white water mold and pink slime). Being a biguanide user, as you all undoubtedly know both mold and slime can be significant problems. I also got new filter grids at the beginning of the season, and so how much of a factor that is in terms of the improved water quality is an unknown but undoubtedly is a huge element in the overall equation. Still, when I slacked off on the use of the tablets a month or so ago, the mold started to come back in a big way. Going back to a higher dose of tablets took care of it within days.