@ Mitton, thanks I spent just over a month and half building new tanks in my spare time. I've attached a picture below of the complete unit. Still got to add in some more branches and plants in the bottom two tanks.
That part was a wrong measure by me . I forgot to add in the thickness of the wood when I did the measurements, but it has at least helped as a place to put feeding tweezers on and when water spills a bit it doesn't run down the glass on the tank below.