Welcome to MAAST! I'm sure you'll get lots of free advice and moral support about whatever's going on in your system. I had a 45 breeder, and I think it's a great reef shape/size. Let me ask a question, when you took out your sand bed, did it have a sulfur smell? Probably the move cooked alot of your sand bed critters, leaving you with a big bio-load in the new set up and fewer animals in the sand to help process it. If you have 4" of fine grain sand like southdown, I'd get some live sand from Tim Marvin in Cedar Park. That will help to rebuild the sand bed population in your tank. After some time repopulating and stabilizing the sand bed, you could get a small yellow tang to knock out that hair algae. Good luck!