Which factors influence filter performance?

Filter performance is significantly influenced by head loss and filtration rate. Head loss refers to the resistance to flow that water experiences as it moves through the filter media. A higher head loss can indicate that the media is becoming clogged or that the filter is not functioning effectively, potentially leading to reduced performance.

Filtration rate, on the other hand, indicates how quickly water can pass through the filter media while still being effectively cleaned. An optimal filtration rate is essential; if it's too high, it can oversaturate the filter and result in insufficient removal of contaminants. Conversely, a very low rate may prolong the filtration process unnecessarily.

Together, head loss and filtration rate determine the overall efficiency and output of the filtration system, impacting water quality and clarity. Other factors mentioned in the other choices, while they may play a role in filter design or water chemistry, do not directly impact the fundamental operational aspects of how effectively the filter removes impurities from the water.