Build the Tank
Clamp the acrylic to the bench and draw each of the three pieces.

 

Cut the middle piece (221 mm X 810 mm) and two leg pieces (255 mm X 328 mm).

 

Draw lines between these coordinate points. The "zero-zero" point is the upper-left corner. The "X-axis" is horizontal and the "Y-axis" is vertical. All measurements are millimeters.

 Point

 X

 Y

 1

 0

 63

 2

 21

 23

 3

 227

 0

 4

 255

 268

 5

 215

 273

 6

 215

 328

 

Clamp both leg pieces (with drawn lines on top) to the bench and cut along the lines.