Just installed my HOG2 on my sump the scrubber side is completely submerged. I am using a Tetra 300 air pump to power it which is puts out 3ltrs per min Tetra say. The air flow over the scrubber is very vigorous. I note you recommend a pump to give a minimum of 2ltrs per min. Do you think the very vigorous air flow over the scrubber is fine or could it be too much?
Thanks.