Have lots of experience with those. Been thinking of attaching a pre filter to the small HOB that came with the tank. The HOB has an adjustment knob on the intake. It's still sitting in it's box.
Just gotta get my hand in the tank and move the live rock on the left side. I do hate to disturb the critters, though.
(Luckily, the Opae Ula all congregate at the opposite end! Lol)
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