Koi pond

Naz

Reefing newb
Hi I am building a koi pond the sides and back is going to be made of brickwork length 5M width x 1m X height 500mm

2500 litres of water

I want to use 2 X 2m X 600mm glass in the front what size glass thickness do I use
 
According to the aquarium glass calculator I used, using your side glass piece dimensions, side glass pieces should be 13.37mm thick and, if you're using glass in the bottom, it should be 14.778mm thick.
 
The sides and bottom is cemented with brick work front glass size is what I wanna know if 19mm toughened glass be correct
 
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