Quote Originally Posted by TomL View Post
should the lid be above the water line, even if the plumbing is submerged .5"-1". The reason i ask is if it is above i am sure foam will collect in there and it will not let the bubbles to flow over the lid. Or should i have it below the surface?

Another drag.......FIREWORMS!!!
They are so tiny its hard to see. You can just see tons of them like little centipedes running around.
The lid should be several inches above the water. The container is pretty long, so in this case it'll be quite tall in your sump standing up on one end. Don't worry about any foam in the bubble tower. If you want, wipe out once a month or so.

Here's a video of the bubble tower I built into one of my first sumps.
http://www.melevsreef.com/video/trapped_bubbles.wmv (1.2 megs)

Bristleworms are fine. They do no harm and clean up detritus:
http://www.melevsreef.com/id/bristleworm.html