[anenefan]

That's a real shame only a few fish survived. It's fortunate only two people hurt. That looks nasty from the picture. Maybe next time less brittle acrylic. Off the top of my head a 14 m high tower of water - there would have been approx 20 psi at the bottom of the tank.

[zimpenfish]

> there would have been approx 20 psi at the bottom of the tank.

[1] agrees with you at 19.9psi

[1] https://www.engineeringtoolbox.com/hydrostatic-pressure-wate...

[gambiting]

Just fyi - acrylic is actually less brittle than glass.

[someweirdperson]

The proper matetial to use is transparent aluminium [0] though.

[0] https://m.youtube.com/watch?v=90eg_erObDo

[anenefan]

To be clear ... less brittle acrylic isn't glass.