Thanks, kzr750r1. The wrinkles don't effect the flow at all. I did change the design so that the cup doesn't stick out 45 degrees and hugs more along the tank. And the cup is oval now since I've seen the ADA pictures.
My eheim uses 1/2" tubing. The production order will be made at 5/8".
Yeah that is an internal reactor. I am waiting on my in line to come in the mail. It works pretty good though.