Originally Posted by
SantaMonica
Looks like scrubbers may grow more pods than first suspected. Especially upflows, when you don't take them to the sink for cleaning (in other words, you just reach in a grab algae). This explains why chromis always hang out downstream of the scrubbers, catching stuff coming by.
My SURF4 was going consistent, and apparently had a huge pod population below the growth, consuming the growth almost as fast as it was growing. It had been running over 3 months without going to the sink, and, fish could not get into the scrubber either, so there was nothing to slow the pods. But then growth slowed down when 2 of the 4 air outlets clogged with carbonate. I did not notice for over a week since I don't pay it any attention. Since the pod population was the same, but growth was less, the pods could keep up with the growth and the growth never increased. When I looked, the pods completely covered the bottom of the scrubber, and would jump right on your hand if you touched the bottom. So I cleaned it in the sink and soaked it for 5 minutes, to kill all the pods. Also cleaned out the air outlets with a paper clip.
This could explain why some SURF2 or SURF4 users have growth in SW but it never "takes off"; it just reaches a certain level and stays there. Pods! Solution: pour some FW in after harvesting. Last resort: take to the sink, and soak it.