I ran BB for two years but still had algae problems. Rearranged the tank (still BB) and it's much better.
Opened up the rockwork (removed about 1/3 - 1/2 the rock), propped the rocks up off the bottom using acrylic rods stuck in holes that I drilled, and increased the flow (hammerhead CL + marlin driving penductors). Now the poop has a hard time settling out before reaching the new Deltec skimmer.
I also included a valve on the closed loop that feeds into a 1/2" flexible tube (like a siphon hose). This can be used to blow off rockwork in an easy 4-5 min process.
Anyway, just wanted to point that out. I thought I was doing BB right, but I wasn't and it was a total pain.