Having only run the system for about 15 hours, I have seen a lot if crud building up on the built-in filter for this pump. The dirt and other debris in the filter was very manageable and wasn’t serious enough to impact the pump’s functionality. It’s extremely easy to pop out the filter and cleaned it. Some people have said that they struggled getting the filter out, but they must gave used a different pump because it literally takes seconds to disassemble, clean, and reassemble. It was easy to clean off, but I definitely cannot wait to improve my system by adding a pre-filter to my pump.
I will try to update this review later when my ducks have had more time to abuse this pump.