I’ve read the Berkely filters don’t get the viruses but will otherwise turn swamp water into something drinkable. I’ve also considered suplementing it with a self made filter system using 3 stages. Cloth for the big stuff, sand, and then DE powder. DE Powder will get the bacteria and viruses.
I live in Florida and while theres plenty of water most of it on the surface isn’t very potable.
Thanks for the tips. These systems do sound better than tablets.