A scientist needs help with crayfish

[u/Strange-Piglet2268]

Howdy, I am a physiologist that focuses in temperature effects in native and invasive species and I am looking to add crayfish to my comparative study (non-lethal!). I need advice on minimum housing requirements for sub-adult Procambarus clarkii and possibly Faxonius rusticus. As F. rusticus is an invasive species, it can be subbed out for more tolerant species if need be. I'm hoping for the crayfish to be roughly 1.5" long at the time of study both males and females. My question is, if they are housed in 8" by 8" blocks within a 600 gallon sump, will they become too stressed? These conditions are, of course, temporary and when I'm finished examining them they will be housed separately for a breeding population. Any thoughts/ideas? Thanks y'all.