Great to see you all tonight! excited to watch the tank "rebuild" thread!
Because we are all nerds I looked up the open web hybrid trusses, here is some documentation @Balz3352 so you can better know what reinforcement you will need. (looks like they are well engineered) http://www.cascade-mfg-co.com/media/floor-truss-guide.pdf (PSF on page 5)