LOL. I know water can be held in concrete tanks. It's been done before and I'm going to give it a shot. From what I have seen in other large concrete builds is the large tank is actually a couple smaller tanks just overfilled to make one large tank. For example the base of most larger builds is a concrete tub with a few dividers. Water can be lowered to below the glass viewing panel and there would still be 2 or even 3 feet more water in the tubs. That way the fish wont have to be moved for maintenance. Just lower the water and a glass/acrylic panel can be replaced if needed. Each tub can be drained individually for crack repair and so on.
I plan to have a 6 foot deep tank. The bottom two feet will be a concrete tub and the top 4 feet will be a 8X4 sheets of acrylic. I'm leaning towards two 8X4 acrylic panels on the long part of the L and one 8X4 sheet on the short side. The corner will have a 3 foot wall going from the front corner to the back corner of the tank. That way I can drain one side of the L and the other side will still have three feet of water for the fish. I might even go with a 4 foot wall cutting the L tank in half if I lower the water level to 4 feet.
Anyway this is still just a dream, but the planning is fun
I was just ribbing ya a little. My first project out of college was a 500 ft parabolic cooling tower for savana river. Then it was a million sf of warehouse floors a year, precast/tilt-up walls and foundations. Heck I even made my own concrete countertops.
The comments I made are direct quotes from my structural concrete professor. Saying "cement" instead of "concrete" would set him off! Good luck and keep researching my man.
