As Carl noted, cal hypo tabs don't perform as well as trichlor tabs, in a feeder. I've never tried them in a floater, so I can't say how they work.

There are some VERY expensive feeders designed for commercial installations, but they aren't very practical for residential use.

But . . . if you are looking for a 'easy' method, running a pool the way the chlorine gas 'shooters' in Arizona, California and Texas do: adjust the CYA to 100 - 150 ppm and dose weekly with 10 - 15 ppm of chlorine. They used to use various algaecides, but you if you maintain very low phosphates (PO4 < 0.1 ppm) you can accomplish the same thing. (You don't want to have to use chlorine as an anti-algae treatment when CYA > 100 ppm, since that requires FC levels as a high as 50 ppm).