So, I'm starting to look into building a very large pond/tank. I'd like it to be inside the garage for making insulation easier. However, I want to make sure that the floor of the garage could hold the weight of something like this. Minimum size I am looking at: 14'x6'x4'. I think I'm looking at 20,000+ lbs of just water, so easy 250 lbs/sqft plus all the weight of the actually building materials. Anyone with experience or knowledge on this subject?