Building a wet/dry trickle filter/sump. I have wanted to do this for a long time. Finally I just sat down and got things started, as I am gearing up to set up a new 55gal salt reef tank. The sump is a 10gal glass aquarium, with almost all parts made from acrylic, the plates glued to the inside of the sump, holding the bio-media are plexiglass. I don't know why we (my friend helping me with the design and I) did that, but whatever.