Rodney and the Genii locate the ninth stone in the map room. Before Rodney points out the six in the middle, you can spot the indent on the temple any treasure hunter could see.
It makes no sense for the Genii to lower their prisoner Ford down into the pit with all his gear, including the flash-bang grenades.
When Ford mentions flash-bangs, Teyla ask what they are. Earlier in the season, she was present when Ford briefed the team on weaponry to capture a Wraith, including stun grenades, therefore should already know what they are.
The Genii spend all their time with Rodney McKay who is Canadian. He refers to the ancient power source as a Zed-Pee-Emm. However, the Genii call it a Zee-Pee-Emm.