Great stuff. Do you know how they assemble those tanks? Its hard to believe that its normal silicone. I wonder if they use that UV process that is stronger than silicone and doesn't require an inside bead to keep the water from forcing its way between the joints.
It's not normal silicone. It's a much stronger silicone made in Germany. That is how we can make our seams and silicone work so much cleaner than other brands.