[Aquattro]

Originally Posted by reef_raf

not done reading this yet, but so far looks like an interesting article from Dr. Ron

http://reefkeeping.com/issues/2004-0...ture/index.php

So this seems to answer some of the questions, while posing some new ones. Coraline growth and population of creatures within the rock can influence filtration capacity. Hmm. Tony, review the parts about "good rock" vs. "bad rock"....