Planted Tank Guru
Join Date: Jul 2010
Location: Huntington Beach, CA, USA
You are still missing the point. The water going in has to equal the water going out.
Are you maybe talking about the velocity (speed) of the water coming out? That could be caused by having too many or too large openings for the output. If you use a spray bar with 5- 1/8 inch holes, the velocity of the water will be much higher than if you switch to a bar with 10- 1/8 inch holes. The flow will be the same but apparent speed will be much different.
Thinking of it as a creek, you may have seen the water looks like it is going really slow when the creek is wide but really fast where it is narrow.
If you want the spray to come out of the spraybar with more "force", close up some of the holes. Trying to improve the design put out by filter designers is a tough sell for most of us. We just don't have the qualifications and experience that the good filter folks have. They get more experience in a week than we get in a lifetime.