Here is my top up tank as it was created. It holds just under 5 Gallons.
Polished up and made lid/tapped in John Guest fitting to hold airline tubing for water transfer:
Got tubing and toms aqua lifter from J and L and installed and water tested box:
In place under a decorative stand my wife finds to be necessary:
Made a cover plate for back chamber to clean up cords and help with evap. it also gave me a secure way to bring water line into aquarium without worry of it slipping out and making a mess:
And all complete (for now anyway):
