Also, WalMart sells CYA in a 4 lb container. Last few years I found it in a 2 lb container in the section for spas and hot tubs, but this year they didn't seem to have it...don't know if they were out or if they're not carrying it anymore.

Follow label directions for amount to target 20 ppm in the pool, but don't broadcast it over the pool like it says to...instead, put it in a knee hi or old tube sock and hang it in front of a return. That way it won't wash out when you backwash your filter.

Janet