That is definitely cool. I also have a cull tank set up, the problem is everything breeds so true now it's hard to find anything to add to it. I've been looking for C grade crs for a while now because I really like the coloration and the fact that they have unique patterns uncommon with the higher grades that pop out clones.They're not in the same league as CRS, but I have a neo "cull" tank where I've put all of the rejected shrimp I've gotten at auctions or from friends and there are some wildly cool shrimp in there now! I have some RCS crosses that look almost identical to TT's. They've also thrown blues, whites and this odd reddish-purplish color (when they mature and molt a few times). I love the variations that occur with "imperfect" shrimp.