As like tito, I too notice a difference in urination depending on the treatment.
As for his treatment, my thought is that his center was drying him out too much. It happened with me. During in-center, I was urinating 200-250ml a day. When I switched to CAPD, that jumped to around 500-600ml and on the cycler I do 800-1000ml a day. I can't explain the differences between CAPD/CCPD since I do the same UF for both