chemicals

My brother and I are just starting out when it comes to unsupported multi-day backpacking(UK). we have purchased lifestraw water purifyers (suposedly filters heavy metals and viruses also). it used to be the case, you would look at the plantlife, and if it was healthy then a good filtering or...

Hi guys, Im am looking for a water purifier that will treat everything, including chemicals and polutants from pesticides and factorys etc. as well as viruses. At first I was going to go for the First Need XL - treats everthing as far as I can tell. Downsides are cost, weight and cartridge...