Moderator Note - Split off from this thread: Liquid Chlorine vs Pucks, and Pucks without Stabilizer
Now our situation is somewhat different as we have an indoor pool and you should not use CYA for those. We use liquid chlorine (sodium-hypo) and it works very well. The only drawback is that the hypo raises the pH-value so we need to add acid to keep it down. But we've an automatic system that measures Redox and pH and adds the chemicals accordingly. It has worked great, the only problem right now is a problem with the pump for the acid.