When this happened to me, I took the lid off the tank and used a cup to scoop up tank water and pour it back in to agitate the surface and get some o2 in there. Did this about once an hour. Like has been said, I'd be most concerned with o2.
When this happens to me, I also pour tank water over my bio material about once an hour to keep it from drying out and the bacteria dieing.
When this happens to me, I also pour tank water over my bio material about once an hour to keep it from drying out and the bacteria dieing.
