Ok here we go. My fish tank is in my office, which is about a 12x12 room. I am going on vacation for the first time while having this tank and need opinions on how to handle the fish room. I have 2 cats that have never messed with my tank, but I will be adding an auto feeder, thus concerned they may try and jump up there and generally when I leave, I close as many doors as possible to limit where they could get stuck. Anyway, my question is should I leave the door to my office open? I really want to close it for piece of mind. I have a vent and return in the office, but don't want to "choke" the tank with stale air or lacking O2. I have a temperature sensor and can monitor the room to ensure it stays cool enough. Question really comes down to the the O2 levels of a 12x12 room with a vent and return for 4 days. Thoughts? Concerns? Am I crazy?


