150/180 weight (floor support)

[Pharaoh]

It will be fine.

 

[creepyoldguy]

Weight will be distributed evenly due to gravity, so you should go by lbs/sq ft not total weight, if the lbs/sq ft are in-line with a smaller tank and that smaller tank doesn't scare you don't worry about the larger tank. Remember the average man is 200lbs and his feet are less than 1 sq foot, so if the thought of having 6 buddies over worries you that your house is going to collapse than the fish tanks should be the least of your worries.

That's what I wanted to hear. I just wanted a little back up for piece of mind. Youre right about my buddies. Theres a lot of my friends into powerlifting and 6 of us would probably outweigh a 180 lol. Plus the way some of these stands are made really make me see the true strength of wood products. Im gonna take some pics of the tank tonight

 

[creepyoldguy]

Just figured I'd go back and dig this thread up for anyone else that is considering a larger tank. I bought a single floor jack rated for 15000lbs and 2x6's to brace up the floor for safety. WHen I set up the jack I just tightened up by hand purposely to see if the joists would flex. I filled the tank up with about 100lbs of sand and all the water. Went down to check on the jack and it was still hand tight. Nothing budged an 1/8" even. It is sitting in the corner of 2 load bearing walls. Just figured I'd give an update in case it may help someone else out someday.