I have a large volume air pump for my scrubber it pushes the bubbles at a high rate in which will cycle my tank through the scrubber I don't know how many times. My tank is 220G and my screen is 9x14 with 138Watts.
IMO .. You don't want a cheap air pump. You want to push that air hard just like if you where cycling your sump. If you have just a few bubbles how are you suppose to cycle the water through your scrubber so it filters it. We cycle our sump 5 to 10 times on some tanks I would think you need to cycle the scrubber.
You need water inlets and water outlets so that water flows through the scrubber. The more bubbles you have on your scrubber the more the water is going to cycle through the scrubber.
Don't buy a cheap 5 dollar pump to make your scrubber. I'm hearing a lot on feeding/cubes and size of scrubber, but nothing on cycling it.
Don't we need to cycle these so they work efficiently?.......This is just my opinion.... I'd like to hear what others say/think
Just a video of my scrubber running with a large volume of water/bubbles flowing out of it. Almost looks like the water is boiling...