leaving

I know this might sound like a silly question, and probably has very little effect on anything. But will leaving my canister filter dry with water drained out for 2 weeks effect the bio material in a harmful way. Is there anything I should be aware of when I go to start it up again after it...

Due to the Winter Storm which is to change over to freezing rain/sleet snow mix in the York, PA area earlier than in the DC Area, my table will be closing at 2:15 P.m. Please come early to buy the fish I will be bringing. I hope to arrive around 11:00 a.m. and have the table set up by 11:30 a.m...