Board Thread:Theories and Speculation/@comment-26636534-20150710195521/@comment-25648500-20150713211657

Thekillman wrote: His chakra pool isn't small by any measure. Hell, Pain said that he and Kisame had the most chakra among the (then known) Akatsuki members.

Pain said that Kisame had a large amount of chakra even for an Akatsuki member. He wasn't talking about Itachi at all.