In the summer they don't supply enough chlorine to keep a pool sanitized.
I also need to run my pools at 60ppm-80ppm CYA.....tablets in skimmer and some in floater. and 1-2 gallons of liquid chlor per week depending on pool volume....
however better to use a salt system and run 80-100ppm of cya..
so my idea of running tablet run pools on 20-30ppm of CYA and a floater fell apart...at least in the summer here in the tropics.. winter it can work,.,,