I have a 125 gallon tank (72x18") on an iron stand and I want to put two 40 gallon breeders (36x18") on the lower part of the stand. My only concern is that where the two tanks meet will be in the center of the stand, and there is not really any support there. I'm thinking that because of this the stand might bow in the center. Does anyone have any experience with anything like this? Thanks in advance for any replies!