Hi Red,

I have an inline trichlor feeder that I use at the beginning of the season and when we go on vacation. It holds 7 pucks. At startup in May I run it at 1/2 strength to get CYA into the water. It takes a long time to raise CYA from 0 to 50 ppm this way and I always have to add granular CYA to get to the level I like. Then I turn the feeder off and use 10% LC. When we go on vacation I run the feeder again at 1/4. By then, I'm no longer concerned about the CYA getting too high because in my pool it usually drops to zero over winter.

I have an awful lot of splashout and replace probably 1/3 of the volume each year. From my experience over the past 7 years I could probably go with trichlor all season. I choose not to because it's much less expensive to get liquid chlorine and it's much easier to calculate dosage for the level I like.

Welcome to the Pool Forum!