Thanks everybody. Skydvr, those are rocks picked up from the ocean floor on a scuba dive off of fort lauderdale. I do believe it is a
DIY wet/dry cannister. My dad made it. I dont know if it is necessary for a 55
gal to have a sump filter, but I prefer overfiltration than under. The fish seem to like the extra movement. My father made it so I cannot tell you how I will try to describe the system for you though:
The picture labeled "black leggings on skimmer" is the beginning of the process where the water falls into it. Then I have a U Tube that is upside down and spans the back ledge of my tank. Through siphoning it takes the water from the in-tank skimmer and deposits it into a divided box. The water fills up one side of the box, falls over the divider and through gravity falls down a perforated
PVC tube with a green filtration sock surrounding the
pvc. It travels down a hose to the cannister you see underneath, falls over a cheesecloth bag filled with
GAC. THe
GAC sits on top of a rolled up piece of filtration material. This material that the
GAC sits on top of filter mechanically and also houses bacteria. THe rest is in the picture. THere is a protein skimmer that I only use to airate the water sometimes since it is useless in a fw tank and the other thing is a pump that pumps it back up into the main tank. I also have a
hob too on the right side of the tank.