Question about Msr Guardian Purifier

The difference between 0.2 micron & 0.02 micron is that with a pore size of 0.02 micron, viruses are also removed. At 0.2 micron, only bacteria and protozones are removed.
In general, water only becomes odourless when filtered through activated carbon, which can also absorb small amounts of pollutants.
Agricultural chemicals, heavy metals, hormones, diesel, petrol or salt can only be removed by distillation.
Caution! Never use such a filter on rivers or lakes that flow through larger towns. (e.g. Rhine)
Use it when you can be absolutely sure that the water has not been polluted by humans at any point.
You should look for rivulets that come directly from the ground or rocks, if possible.

I am not a chemist or laboratory technician either, but due to my general knowledge in the field of physics - Matura with supplementary subject physics - I know with probability bordering on certainty (yes, probability calculation was also part of the examination material in maths) that the filter, which filters particles up to a size of 0.02 microns, does not retain any substances dissolved in water. That is, toxic solids larger than 0.02 microns are filtered, but smaller toxic particles and substances dissolved in water are not. Note that the filter is also ineffective against acids and bases. See also manufacturer's information: https://www.msrgear.com/de...

Water-soluble toxins in water can, as the name suggests, be dissolved with water...