Hello, wondering if anyone knows what type of pump this is? Two of them came with my Red Sea Max s400 and they are the circulation pumps in the back chamber. I bought the system used so don't have any manuals and it seems red Sea has changed pumps over the years. I pulled it out to clean it but I'm unsure how to disassemble it. I want to do a full clean and make sure nothing's corroding inside. The only thing on the exterior is a logo of a whale. Anyone know this model let me know so I can download a manual as to how to disassemble it. Thanks!