As another data point, I regularly keep 3" tabs in my floater in the pool. Helps maintain chlorine levels as I don't test all that regularly and don't swim all that often either unfortunately. We have lots of rain here in South Florida so I am usually draining a full pool and that helps keep the CYA in check. I also have a rising pH issue due to my spa spillover and the acidic tabs help control that issue as well. So, as mentioned above, BBB is about understanding what you are putting in your pool and why. For me, the tabs are a great solution and solve several issues.