I'm going to be going away for about 4 days and I was wondering how long is safe to leave a tank. I have a 125 with a 12" Mbu, 5 "NTT, 12" Fire Eel, and a 6 " Bichir. Also a 75 with a 5"GT and some convicts as well as a 5" Carpinte in a 40 breeder. Will they all make it 4 days unharmed? I worry about the electricity going out but there isnt much I can do about that without a battery back up. I thought I could flood the tanks with ghost shrimp and feeders to be safe. Any input?