All it does is allow flow from an overflow to enter into that section, (one blocked off from the main area of the sump), and the top is open to the air, and in the bottom there are notches/holes etc.., this way, the flow is reduced and the bubbles are allowed to rise to the surface to pop and the flow goes downward and out the notches/holes in the bottom, bubble free!
Chris
__________________
No more tanks  - Laying off the ReefCrack for awhile!
Cheers,
Chris
|