Nope. Not only is that NOT the most impressive tank ever, it's not even the most impressive tank in that house. GO TO PAGE 10 of that thread and select the link to his upgrade. Glynn replaced his 8000l tank with an even more impressive 17,000l tank. Around page 7-8 of that other thread he links a video of the beast which is an awesome culmination to the build discussion and pics.
Dude, thanks for the link. It was an incredible read. I tried to post the second link but the phone lost it and I didn't want to go searching again as my phone is acting up.