I recently got a 10 gl given to me and I have been cycling it and I have added ghost shrimp to it about a week ago. I would like to get a crawdad, maybe a blue or orange one. Sorry don't know any specific breeds yet. I want to set his home up now and give it a few weeks, then move him in. O and I don't plan to keep the shrimp in there I know he will eat them. My question is what kind of tube do I need to make him a home. I have heard just regular pvc pipe but what size do I need. Would there be something better than pvc.