Matthew: Thanks! I had found that page when I first got my crayfish and hadn't been able to find it since then! A lot of useful information there.
Bill: I can't believe anyone would want to keep crays in a planted tank! I had plants in his tank originally and the pulled them all up and ate them within a few days LOL. I will definitely visit that site though to make sure I'm not missing any good info to have!
And I'll definitely update as he moves things around and as I add more fake plants. I plan on getting some long plastic plants that will come up and partially float on the surface so he has something climb on besides the rocks. I think I may have sent the tank into a mini cycle with the new guppies. It's extremely cloudy now, but I don't have a test kit (I know, shame on me). Not much I can do now but keep up with water changes until it's over and hope that the new filter comes soon!