The Calfo was made with 2 pieces of 3/16" glass cut by a local shop for me. I siliconed them together along the length then painted them with the same automotive blue urethane I painted the tank back and sides with (Energetic blue metallic). Not wanting to expose the water to this paint (due to potential contamination), I sealed it with several coats of an epoxy that is used for painting municipal water supply equipment (FDA approved). Once the paint was dry I siliconed the assembly to the tank itself. I sloped the vertical piece towards the front of the tank by about 5 degrees so that water overflowing the top actually runs down the surface rather than a straight drop. Keeps it real quiet and no bubbles. The single drain has no problem handling the flow of my return pump (QO 6000) which I'm guessing is around 900 GPH with 1' of head and several elbows and Ts.
Francis
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