I need some advice on moving my 90 gallon tank to an apartment on the second floor. First question that is running in my head is, will the floor be able to support the weight of a 90 gallon tank? I would think that all of the furniture that goes into an apartment would be heavy also, but I do know that a 90 gallon tank filled with water can be very heavy. I am serious about this question and I am just not sure if this can be done or not. Please help me out Monster Fish Keepers. I do not want to get rid of my fish. Thanks for all of the advice and comments. Also, how heavy is a fully filled 90 gallon tank?