Well, I am making them now, per order.
No internal temps... the lighting units themselves (which are aluminum) get a little warm to the touch, but the acrylic does not, and the inside does not. And if you leave the lid off, it will cool the water (especially if you put a fan on it.)
If the flow stops on the screen, the only problem is the algae on the screen starts dying. If the lighs are on the whole time that the flow is stopped, the algae has from 2 to 6 hours to live, depending on how thick it is when the flow stops. If the lights go off when the pump goes off, the algae can go 4 to 24 hours before dying.
No internal temps... the lighting units themselves (which are aluminum) get a little warm to the touch, but the acrylic does not, and the inside does not. And if you leave the lid off, it will cool the water (especially if you put a fan on it.)
If the flow stops on the screen, the only problem is the algae on the screen starts dying. If the lighs are on the whole time that the flow is stopped, the algae has from 2 to 6 hours to live, depending on how thick it is when the flow stops. If the lights go off when the pump goes off, the algae can go 4 to 24 hours before dying.