If you do a search on reefcentral or reefs.org for "calfo overflow" you'll find info about it. This is definitely the way to go; basically there's a shelf which allows the entire length of the tank to functon as an overflow without taking any space on the bottom of the tank, and is much quieter, and has much better flow capacity, and is much less likely to get stopped up by a snail. Probably three holes would work for a 125, but go for 1.5" bulkheads. Maybe a little overkill, but I bet you won't regret it.

Oh yeah, a great place to see drawings and designs for the calfo overflow, and lots of other great ideas, is Anthony Calfo's book, but I forget what it's called. someone here will know. Have fun; sure wish I was still building skimmers!

P.S. for those who might be wondering, looks like the summer before I can get a shop up and running :cry: