Join Date: Jan 2004
Location: Formerly Central Coast CA, Now in Bridgeport TX
You should be fine, just watch your temperature. In all honesty, the water temp shouldnt drop that rapidly unless its really cold in the room. with your filter turned off your element will stay wet, so the bacteria should be fine, even if you were to (unlikely) have some die off of bacteria, the remaining will re-colonize rapidly. Your fish should have no problem surviving that short of a time period, and your plants won't even be affected. if you have pressurized co2 turn it off during the power outage to prevent a pH drop.
Planted tanks are all about shrimp.