AquaDom

The AquaDom (mixed Latin and German: 'water dome', more formally 'water cathedral') was a 25-metre-tall (82 ft) cylindrical acrylic glass aquarium with built-in transparent elevator inside the lobby of the Radisson Collection Hotel in the DomAquarée complex at Karl-Liebknecht-Straße in Berlin-Mitte, Germany.[1] The DomAquarée complex also contained offices, a museum, a restaurant, and the Berlin Sea Life Centre aquarium.

On 16 December 2022, the AquaDom aquarium ruptured and collapsed, propelling the 1,500 fish inside into nearby facilities and streets, causing considerable damage and killing the majority of the fish. A vertical indoor garden took its place in the lobby of the hotel, which reopened in February 2025.[2][3]

## Contents

* 1 Construction
* 2 Operation
* 3 Collapse and aftermath
* 4 Similar events
* 5 References
* 6 External links

## Construction

The AquaDom opened on 2 December 2003[4] at a cost of about 12.8 million euros.[5] The acrylic cylinder was manufactured by International Concept Management, Inc. using Reynolds Polymer Technology panels, with architecture drawings provided by Sergei Tchoban. It was located in the same building as the Berlin Sea Life attraction but was owned and operated by Union Investment.[6][7]

The aquarium was constructed from 41 acrylic panels – 26 panels for the outside cylinder and 15 panels for the inside cylinder for the elevator – which were bonded together on site.[8] With a diameter of about 11 m (36 ft) and a height of about 16 m (52 ft), resting on a 9 m (30 ft) tall foundation, it held the Guinness World Record for the world's largest cylindrical aquarium.[9]

## Operation

A scuba diver at work in the tank

The water column was 14 m (46 ft) high,[10] held 1 million litres (260,000 US gal; 220,000 imp gal) of saltwater and accommodated about 1,500 tropical fish from over 100 species. A team of scuba divers conducted daily feedings, with 8 kg (18 lb) of feed-fish, and cleaned the tank daily.[8] According to Union Investment, the owner of the complex,[11] the wall thickness of the outer acrylic cylinder was 22 centimetres (8.7 in) at the bottom and 18 centimetres (7.1 in) at the top. The water temperature was kept at 26–27 °C (79–81 °F).[12]

In 2020, the aquarium was refurbished and upgraded, with all the water drained and the fish temporarily relocated to a breeding facility in the basement.[13] According to the owner, seals were renewed at the base and an additional sealing level was fitted. The cylinder was repaired and polished in places. Maintenance work on the elevator was conducted.[12]

## Collapse and aftermath

Rescue workers searching through the debris of the AquaDom on the morning of 16 December 2022.

The cylindrical tank burst at 5:43 am local time (4:43 am GMT) on 16 December 2022, sending approximately 1 million litres (260,000 US gal; 220,000 imp gal) of water together with the tank's 1,500 fish into the hotel lobby and adjacent street. Sandra Weeser, a member of Germany's Bundestag staying at the hotel at the time, described awakening to "a kind of shock wave".[14]

Berlin's Technisches Hilfswerk (THW) rescue team mounted a full-scale deployment,[15] completing operations 12 hours later -- with the hotel's lobby and atrium remaining devastated, described by onlookers as resembling a battlefield.[16]

The majority of the 1,500 fish were killed[17] and two people were hospitalized with injuries. Officials noted the collapse could easily have taken several lives had it taken place during the hotel's busier operational hours.[15][18][13]

Detected by local seismographs, the collapse sent the water out of the hotel lobby and into nearby storm drains, but not before damaging several nearby businesses, including a neighboring Lindt chocolate shop[15] and the basement of the adjacent DDR Museum, the latter of which reopened three and a half months later.[19][20] An associated power loss threatened hundreds of smaller fish in the facility's breeding tanks, which were ultimately rescued.[17][16]

With no suspicion of foul play, and prior to a formal investigation, suspected causes included material fatigue,[21] exacerbated by the difference between Berlin's very low air temperature (−9 °C (16 °F) that night), and the tank's water temperature (26 °C (79 °F)).[22]

On 24 October 2023, prosecutors closed the investigation into the rupture after experts failed to determine a conclusive cause.[23]

The hotel reopened after two years on 12 February 2025, with a 24-metre (79 ft) vertical garden consisting of about 2,000 plants of 22 species replacing the aquarium.[24][2]

## Similar events

Catastrophic failures and major leaks have occurred at numerous large acrylic tanks, including failures at the T-Rex Café at Disney Springs in Orlando; the Dubai Aquarium at the Dubai Mall; the Orient Shopping Center, Shanghai; the Gulfstream Casino, Hallandale Beach, Florida; at the Lotte Tower, Seoul, South Korea and at the Mazatlan, Mexico Aquarium.[25][26]

## References

1. ↑ "Radisson Collection Hotel, Berlin". https://www.radissonhotels.com/en-us/hotels/radisson-collection-berlin.
2. ↑ 2.0 2.1 "Geplatzter Aquadom wird zum "Living Tree": Ein vertikaler Garten in Mitte". Berliner Zeitung. 12 April 2024. https://www.berliner-zeitung.de/news/geplatzter-aquadom-wird-zum-living-tree-ein-vertikaler-garten-in-berlin-mitte-li.2205449.
3. ↑ "Radisson Collection Hotel, Berlin opens as a new icon in the German capital", Radisson Hotel Group, 12 February 2025, https://www.radissonhotels.com/en-us/corporate/media/press-releases/Radisson-Collection-Hotel-Berlin-opens-as-a-new-icon-in-the-German-capital/Index.html
4. ↑ Aulich, Uwe (2 December 2003). "Im Panoramalift durchs Fischbecken: Heute öffnet das Sea Life Berlin mit dem weltweit größten Aquarium: Fünf Minuten Karibik" (in de). Berliner Zeitung. https://www.berliner-zeitung.de/im-panoramalift-durchs-fischbecken-heute-oeffnet-das-sea-life-berlin-mit-dem-weltweit-groessten-aquarium-fuenf-minuten-karibik-li.9270.
5. ↑ "Hotel-Aquarium in Berlin" (in de). Die Welt. 24 December 2003. https://www.welt.de/print-welt/article282078/Hotel_Aquarium_in_Berlin.html.
6. ↑ Grantham-Philips, Wyatte. "Giant aquarium 'completely destroyed': Tank with 1,500 fish bursts, floods Berlin street" (in en-US). https://www.usatoday.com/story/news/world/2022/12/16/giant-aquarium-berlin-aquadom-bursts/10908495002/.
7. ↑ "Berlin AquaDom aquarium: Police not seeking suspects over explosion" (in en-GB). BBC News. 2022-12-17. https://www.bbc.com/news/world-europe-64010677.
8. ↑ 8.0 8.1 Aquadom, Reynolds Polymer Technology, https://www.reynoldspolymer.com/projects/aquadom/, retrieved 16 December 2022
9. ↑ "Largest cylindrical aquarium". Guinness World Records. https://www.guinnessworldrecords.com/world-records/85193-largest-cylindrical-aquarium.
10. ↑ "Aquadom Custom Built Aquarium". Reynolds Polymer Technology. http://www.reynoldspolymer.com/Portfolio/Aquariums/AquaDom.html.
11. ↑ Diese Unternehmen stehen hinter dem Aquadom in Berlin, Thomas Krause, Stern, 17 December 2022
12. ↑ 12.0 12.1 Aquadom geplatzt , B.Z., 16 December 2022
13. ↑ 13.0 13.1 Ellrodt, Oliver; Schlie, Tobias (16 December 2022). "Huge Berlin aquarium bursts, spilling 1,500 fish onto road" (in en). Reuters. https://www.reuters.com/world/europe/massive-aquarium-bursts-berlin-leisure-complex-emergency-services-2022-12-16/.
14. ↑ McNamee, Michael Sheils; Hill, Jenny; Steininger, Michael (16 December 2022). "Berlin's giant AquaDom hotel aquarium containing 1,500 fish explodes". BBC News. https://www.bbc.com/news/world-europe-63996982.
15. ↑ 15.0 15.1 15.2 Solomon, Erika (16 December 2022). "Berlin Hotel’s Huge Aquarium Bursts, With 1,500 Fish Inside". The New York Times. https://www.nytimes.com/2022/12/16/world/europe/germany-aquarium-aquadom.html.
16. ↑ 16.0 16.1 Hotelgebäude nach "Aqua-Dom"-Havarie nicht einsturzgefährdet – THW beendet Einsatz, Rundfunk Berlin-Brandenburg, 16 December 2022, https://www.rbb24.de/panorama/beitrag/2022/12/aqua-dom-aquarium-geplatzt-thw-einsatz-feuerwehr.html
17. ↑ 17.0 17.1 "Huge Berlin aquarium bursts, unleashing flood of devastation" (in en). 2022-12-16. https://www.ctvnews.ca/world/article/huge-berlin-aquarium-bursts-unleashing-flood-of-devastation/.
18. ↑ "Sea Life: Riesenaquarium am Berliner Dom geplatzt" (in de). Die Zeit. Deutsche Presse-Agentur. 16 December 2022. https://www.zeit.de/news/2022-12/16/grossaquarium-mit-1000-tonnen-wasser-geplatzt-zwei-verletzte.
19. ↑ Groß-Aquarium geplatzt - Materialermüdung könnte Ursache sein, Rundfunk Berlin-Brandenburg, 16 December 2022, https://www.rbb24.de/panorama/beitrag/2022/12/berlin-karl-liebknecht-strasse-aquarium-feuerwehr-polizei-einsatz.html, retrieved 17 December 2022
20. ↑ Valencia, Antonia (2023-04-01). "DDR-Museum öffnet wieder: Wie kommt das Salz auf die Erika-Schreibmaschine?" (in de). https://www.berliner-zeitung.de/mensch-metropole/wiedereroeffnung-von-ddr-museum-wie-kommt-das-salz-auf-die-erika-schreibmaschino-li.333995.
21. ↑ "Sea Life Berlin: Großaquarium Aquadom zerstört – Wasser in benachbarte Keller geflossen – Ein Dutzend Fische gerettet" (in de). Die Welt. 16 December 2022. https://www.welt.de/vermischtes/article242714393/Sea-Life-Berlin-Grossaquarium-Aquadom-geplatzt-Alle-1500-Fische-tot-Ein-regelrechter-Tsunami.html.
22. ↑ RTL aktuell, 16 December 2022
23. ↑ "Prosecutors close investigation of Berlin aquarium collapse as the cause remains unclear" (in en). AP News. 24 October 2023. https://apnews.com/article/germany-berlin-burst-aquarium-investigation-closed-aquadom-f94b95c889642f4b59896431ebc30157.
24. ↑ "Radisson Collection Hotel: Reopening with Spectacular "Living Tree"" (in en). Airport Region Berlin Brandenburg. 13 February 2025. https://www.airport-region.com/news/radisson-collection-hotel-reopening-with-spectacular-living-tree.
25. ↑ Gramann, Paul J. (13 July 2018), "When acrylic aquariums fail", Plastics Today, https://www.plasticstoday.com/materials/when-acrylic-aquariums-fail, retrieved 16 December 2022
26. ↑ Gramann, Paul J. (9 July 2018), Investigating Acrylic Aquarium Failures, The Madison Group, https://madisongroup.com/wp-content/uploads/2022/09/Investigating_Acrylic_Aquarium_Failures.pdf Alternative URL

## External links

* CityQuartier "DomAquarée"

Template:2020s building and structure collapses Template:Zoos of Germany

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