Start by naming what is actually in the water.
Three different things are often grouped together: residual chlorine used during water treatment, visible particles that may come from household pipework, and dissolved hardness minerals such as calcium and magnesium. A product designed for one of these jobs should not be assumed to solve the others.
Luscentra reduces residual chlorine by up to 99%. Its microfibre layer helps catch visible particles such as rust and sediment. It does not soften dissolved hardness, remove every dissolved substance or disinfect incoming water.
A suitable water test and the advice of a qualified local professional are the right starting points when the composition or safety of a supply is uncertain.
Performance varies with inlet pressure, household plumbing and product configuration. Figures based on manufacturer testing of corresponding models.