Ime if many bubbles get the chaeto you may get cyano and/or hair algae growing in the chaeto ball. Do you have an ATO? (sounds random but it's not lol)

For baffles, I would go under, over, under, and don't let the over drop more than an inch to the water level in the next chamber.

Biopellets > Refugium

I like the use of a DSB mangrove config but I also grow Cheato, run biopellets and have a copious amount of live rock.

http://img25.imageshack.us/img25/2010/p1130217.jpg

That's a nice mangrove forrest you have growing there! I especially like the ship.:biggrin: