Quote Originally Posted by RedfordReefer View Post
That won't be too much flow though the sump? I was looking at the QO3300 which would put me at ~494GPH through the sump.

My thought is that the more time in the sump, the more time for the Chaeto to work.

I have two Koralia 3's to augment flow inside the tank. I might pick up another Koralia 2 or even another Koralia 3 to further increase the flow.
Good point, if your going to harvest Chaetomorpha for nutrient reduction you definitely want a longer dwell time.