This new Blumat input filter fits on the Blumat Bulkhead Through-Hull Tank Connector, inside the reservoir and keeps sediment and leaves from getting into your supply line. It doesn’t fit on the older tank connectors we had before August 2023 though. The new ones (on the right in the picture below) have two tabs on the sides and a 6-sided jut on the input side, where the old ones have two parallel lines.
An inexpensive "insurance policy," this could save you quite a bit of headache if your water doesn't always stay clean.