<p style="text-align:left;">What is the best combination and number of critters in a CUC? I have a 50 gal (36x18x18) set up for about 9 months. What I have now is a couple hermits, a turbo and plenty of bristleworms. I'd like something to stir up the sand bed more. I've had my HA outbreak done and gone, so the turbo wouldn't stand any competition there. Thanks!