I made a filter in high school Biology. Swamp water into a coffee can with a hole in the bottom. Fine sand bottom with courser sand above, then small pebbles to larger rocks at the top. Then I added one drop of tincture of iodine to a glass, stirred a minute then drank it.
We use screen pre-filters for my catchment tank. It goes by DC pump with a switch, through a very good filter, if pure water is needed. Otherwise the water is used for all the gardens. Gravity to waterers, and hand watered. I learned not to use plastic tubes for drip irrigation from their twisting tendency. Not enough room for the spirulina method.
Apparently beast felt too censored and left. I was gone because of a forced computer change because of an antivirus virus. Lost all the contacts and favorites. Now I am back. The old vet with all solar and Earthship in CO at 8,878′.