My tank window

For a very long time i have wanted to get back into tropical fish. Going back to before i arrived here in Portugal i have been searching for tropical fish shops but had great difficulty finding any.
Ever since i found a couple of shops  last summer i wanted fish but me being me i wanted some think unique so that's why my tank will be about 5,000 litres in size.

This is the frame for the window at the front of the tank. The window is 1000mm X 500mm just the perfect size in relation to the tank size.

Here is the tank ready to have the window frame opening made. All the brickwork will be reinforced in still bar called Rebar to add further strength.

This is a 30,000 gallon tank i have been watching on Youtube but this tank is for Koi carp not tropical fish.