Greg,
I use a CBB to control aptasia this is my experience so far fwiw.
CBB's will control aptasia effectively
Have an alternate food source for them, mine loves mysis.
They will continue to pick at the rocks as long as the lights are on.
Do not place CBB's in tanks with Tangs larger than themselves.
I had 4 tangs and added 3 small cbbs it was a friggin mess.
the tangs were brutal and the cbb's developed their own pecking order.
I lost one CBB the first night, it came in sick, and I gave a second one away which was subsequently killed by a yellow tang in another tank
I got rid of all my tangs to give the CBB room, and also to lower my no3.
It took about a week for my CBB to start eating mysis.
He is doing great, except for a cyst he has developed in one of his eyes.
He has even gotten used to the cyst and is eating normally.
I hope this helps, my recommendations to CBB keepers are one to a tank, no large fish to harrass them, and make sure they get frozen mysis once a day.
- jonathan
