I say rinsing (w/ SW) because they are just as likely of a detritus trap as the chambers themselves. IMO there is far less free floating bacteria that would denitrify vs. the amount of bacteria in and on your rocks and I think a microscope would back me up. However, large WC in a small tank requires a keen eye to ensure you aren't messing with the chemistry too much (far more keen than me). You're right, cyano is a bacteria. Unfortunately, A photosynthetic bacteria that really doesn't need much light to keep going.


Sorry if my sentences were broken up, I was googling you some helpful articles at the same time. I've become a little nuts w/ reading Randy Holmes articles and boy is there A LOT of them! Here's some articles that may given you some more insight to what you are fighting.

Nitrates: http://www.advancedaquarist.com/issu...t2003/chem.htm
Organics: http://reefkeeping.com/issues/2004-10/rhf/index.php
Iron: http://www.advancedaquarist.com/issues/oct2002/chem.htm
Dinoflagellets (not the same thing but they share a common ancestor and can help you in understanding the cyano, also dinos tend to pop up after you have finished w/ cyano.)
http://reefkeeping.com/issues/2006-11/rhf/index.php