The pondxpert flowmaster 3500 offers incredible value for money and is the first ‘proper’ pump that can operate as both a traditional filter pump and a fountain pump.twin strainer cage thanks to its two strainer cages, the flowmaster pumps will not block up when being used as a fountain. The outer cage allows solids 5mm particles to be passed through the pump to the filter whereas the inner cage sits just inside the tough pump impeller and blocks solids being circulated, allowing a fountain to be run.fountain attachments the flowmaster pumps come fully equipped with a range of fountain attachments to create an array of features. The fountain heads can be used to create 3 different displays while the t piece can be used to control the flow rate on the fountain feature.easy, tool free maintenance simply push the sides of the filter inwards and the strainer cage unclips, allowing easy entry to the pump motor.cleaning inlet for quick cleaning, the flowmaster pumps have an inlet at the front of the strainer cage that can be used to flush out any waste.