Hi JT,

A simple and cheap method (if you don't use the water for drinking) is buy yourself a swimming-pool set. They sell kits for small pools/spa's with chlorine tablets, test-strips and PH-minus at the lager supermarkets. When I arrive at the finca I bring the water to a PH and chlorine level recommanded for a spa. After that I pump it through a UVC-filter system (I bought it in Holland but I think they sell them at Bauhaus too). The UVC is optional but will allow you to lower the chlorine level (UVC kills things like legionella). Also if you don't use a pump/filter you have to do something else to mix the water/chlorine (stirr it?).

Good luck,
Mark