Paddy, if you're so sure it isn't the carbon why don't you use some of Daniella's carbon in
your reef?
Anything is possible, and it sure seems suspect that there are so many people having troubles with their new container of Kent carbon in the last month or two. It will be interesting to see how this develops.
I jut ran out of Kent carbon a couple weeks ago, and decided to try out the Brightwell Aquatics carbon as I have really been liking their other products lately. It sounds like I was lucky for once! Whew.