It is a custom built filter. It seems to be working flawlessly. I cant wait for the tank to cycle so I can throw some shrimp in there and begin a colony.
I bought the 2 sponge filters and HOB filter from a LFS. I then attached the two sponges together using the tubing they came with. After that I attached to filter intake to the out put of the sponges with clear tubing. The filter is working GREAT. I love it!