The thing was just recently reopened after revision, here is an interview after the overhaul: https://www.domaquaree.de/de/Modernisierung-AquaDom.html

Interesting bit:

> It got a little tricky when taping off the glass envelope with foil to prevent possible cracks. Acrylic glass is a sensitive material that absorbs water over time. If it then dries out too quickly, cracks can appear even in the glass walls, which are up to 20 centimeters thick.