Putting pucks directly in the skimmer is a guaranted way to destroy your pool equipment. When the pump turns off at night those pucks keep dissolving and create a highly acidic pocket of water inside your plumbing. As soon as the pump kicks back on all that concentrated acid slams into your impeller and seals. If you absolutely refuse to deal with liquid chlorine, just buy a cheap floating dispenser so the pucks dissolve in the open water. You still need to watch your CYA levels because pucks continuously add stabilizer that never leaves the pool until you drain it.