1) The top of the floater is ALWAYS a lot wider than the puck area for bouyancy, so it doesn't flow directly down the pool wall
2) They have slits in the sides, not the bottom, so the chlorine sort of trickles out, pre-dissolve in the water in the floater.
3) adjustable ones allow you to dial down the slit size
4) It just doesn't seem to be a problem
5) The REAL problem is keeping them from going to the skimmer opening and sticking there!

(PS: I rarely use puck either )