I would not risk it (125g upstairs), I had about 5 gallons spill late last night python/sink connection malfunction====== a crappy time cleaning that up at 1 am........I could not imagine 125 gallons flowing into the basement......... I'd throw a toaster into the mix cuz the wife would shoot me anyways............I only have a 30 on my main floor, a 30 on the 2nd floor and my 125 in the basement................I woke up in a cold sweat the other day when i heard class breaking (2nd floor)...........well my versa top cracked, cuz my 8" gold sev decided to break it..........so could have been worse...........