meegosh said:Are they fogging or doing a heat treatment?
Mumma.of.two said:I would think if you completely sealed off the tanks with plastic (cling wrap maybe?) and tape they would be fine. Making sure all air pumps and filters are off so not to pump toxic air into the tanks. Then you'd have to make sure nothing got into the tanks when removing the plastic. Maybe even lower to water level so their is more oxygen sealed in the top of the tanks.
Flossie said:Just keep everything off for how long? Air stones needed?
Mumma.of.two said:I would think a few hours until the air has cleared (can't smell it anymore) in the house. You don't want to use air stones because the pumps suck in air from the surrounding room and pump it into the tank. The air around the tank in the room is going to be toxic!