Gairresguoika is an somewhat difficult to reach pool between Kairanen and Kovakoski. Well known to hold fish, it's worth a try - especially when the water level starts to sink. 

The pool is available from both banks, and the east bank would be the recommended one, mostly because it's easier fishing from this side. Walking downstream from Kairanen to Kovakoski on the west side, you should still consider taking some casts here.