Originally Posted by somewhatshocked
There may be more detail about the spray bar in my 12gal journal.
It's rigid tubing. Its OD is the same size as the ID of the tubing I'm using. You can buy rigid tubing from most fish shops/pet stores and online.
Just a plastic cap that fits over tubing.
Holes are less than an inch apart, some going slightly up to agitate the surface, some going slightly down for water flow. The amount of holes, distance, size, etc really depends upon the filter you're using and how much flow you need. For me, I just did a trial and error thing with the filter.
Okay, Ill take a look at your 12g journal.
I have an eheim 2213 as well, so i was gonna piggy back off of your findings