I would dump the 430, but do NOT replace it with a Hayward CL200, which *severely* restricts water flow, and which also has a 'broken from the factor' feed regulator. I'm not in love with tab chlorinators, but if you go that route I'd strongly recommend the Rainbow 320 ( -- there are other sellers besides this one, but watch the shipping costs!). The 320 also allows you to use standard tabs, and works pretty well.

But . . . you will need to move whatever feeder you have downstream of the filter.

And -- this is VERY IMPORTANT -- if you have a pool timer, do NOT allow it to turn the pump off for more than 12 hours at a time. Dangerous gases can accumulate in feeders when you do. Likewise, if you start up your pump, after leaving it off (for a power outage, whatever), get people out of the pool and away from the inlets. Trichlor feeder units can 'burp' chlorine gas when they've been left off for days.