Brian,
Is the green water something you are propagating or did it just show up?
Bill,
It's intentional. Brian described his intentions, and he can fill you in more.
Typically, it's for first feeding and more with some species that don't readily take to prepared feeds after their yolk sac is absorbed. Food source if you will, that's built into the system that the fish are natural to.
Really kinda neat, but think there might need to be some production control??? I could never get over the thought that GW could eventually whack a biofilter, but with an MBBR, could be a mute point. Although still suspect some cling on value in the overall scheme.
If Brian say's it's working well, I'll buy that.
