Are these available in Phuket? Cheers

you could try here, he is quite helpful, knows his stuff , speaks english and is reasonable:

Google: phuketwaterfilter

One option using bleach?

http://www.doh.wa.gov/Emergencies/EmergencyPreparednessandResponse/Factsheets/WaterPurification.aspx

One option using bleach?

http://www.doh.wa.gov/Emergencies/EmergencyPreparednessandResponse/Factsheets/WaterPurification.aspx

^^^This is what we do. Haiter brand in the light blue bottle is what you want to use.

Nothing gets rid of all the problems, but bleach gets rid of a lot (and it's cheap)

Study up on it and use the right dose.