Over the past two months, I've watched algae grow in the overflow. Since it is lit from the metal halides above, a cover was needed. Now that the fifth and final Durso was installed, the cover could be fabricated and placed over that area. I decided to make the cover big enough to cover the entire external overflow and overhang the teeth a little. It had to be drilled for the Durso caps, as well as for the Aqua Controller probes. Top side ...