Hubs and Plantastic,
Here's how I tweeked my tetratech. It wasn't very complicated, but it has improved the tank over 200% in water movement and reduced it in surface agitation.
Positioned in the top left:
(pay no attention to the wild star grass, did some serious trimming last night)
Closer view. Note the ring attachment. Without it, the outflows are barely below the surface:
I pulled out the siphon tide thing that comes with the filter on the right side of the photo.
I shut off the middle outflow by positioning the dial all the way to the left. This stops the filter from blowing everything beneath it all over the place.
Front view of the filter. Usually the outflow on the left of the picture is plush against the top. The 1.5" addition has made a world of difference.
Top view of the filter postioned on the back of the tank:
Told ya I trimmed the star grass!! :P
Anybody want some
There are about 50 stems in there!!
Tweeking the tetratech filter has (so far) kept bga out of my tank. I had the same problems that most people have with it- just creates too much surface agitation. Now, my surface agitation is miniscule and my underwater movement is ideal. My star grass waves in the water flow. It's a very lively planted tank.
If I had more money, I would go cannister, but for now, I'm getting by very well with the tetratech. I used to hate it, but I love it now that I messed with it. This model also is a great size for this tank. Lots of filtration.