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It would say that the tank is "Done"..but I know that is a foolish statement. So I'm going to declare the tank "Ready".

The final big step was just completed. I gave up on being able to design the light lifter so well that I could have some aluminum fabricator build it perfectly....so I built it from 2x2.

Here's the overhead tracks. These allow the lights to slide straight backward into the fish room.



Here's the completed frames. This is a picture of both the upper and lower frames with the actuator fully lifted such that the lower frame is squeezed up against the upper frame. The actuator slides 30" horizontally, while the cables and pulleys tranfer the horizontal movement into vertical movement.



Here's the end result. Let's just say that the forest behind our house is no longer dark in the evening!