Looks like you're off to a good start. The clowns don't need PVC, they'll find something they like and make it they're host, and they'll decide what that is. There's no guarantee that they'd even use the PVC as a host if you did put it in.
My suggestions:
Don't rely on the UV for disease control. They don't do much. I run a UV because I feel that it cleans the water up just a little extra bit and I had one, but if I were to have a disease outbreak of some sort, it would do little to no good. Quarantining is the best route to help prevent disease in your tank.
More live rock
Keep an eye on those bubbles, it looks like they're coming from the return pump. You might want to angle it down just a little so that the top of the water looks like a slow boil/churning of water, but not a bubbling over pot.
Yeah,i was thinking more LR but its such a small talk so I wasnt sure and im thinking dry rock from now on because of disease control,its just safer that way. As far as pvc goes,i have a piece and a lil clay pot as well,so the clowns have plenty to choose from as far as hosting goes. I adjusted the return pump like u said and all is good now. FYI-My clowns are pairing up,they do the lil dance and all and spend all day together and sleep side by side. So I may have a pair soon.
