I am definately reinforcing the floor. Yes it is a crawl space in which I have multiple extra floor jacks to support the weight of my 220 gal and other tanks but I am working on installing some steel beams I have for a more permanent solution to the added estimated 6,000 lb weight problem. My girlfriend jokes and says the only reason she let me do this project was because she hoped the floor would collapse and I would have to build a new house! The stand is 2x12's and 2x8's drilled and bolted. I wish I had used 2x6's so I have a larger opening to the space below for fiters, ETC. Thanks for all the subscriptions so far. I'm really excited about this project.