Hi! Mach, here is a picture of green water in a 500mL glass beaker. It is backlit by the afternoon sun.. http://members.xoom.com/ggrk/gw2s.jpg Is the water green enough? From your page I feel that your green water looks greener.. or is it the neighbours water is always greener syndrome? Cheers -- Raj, vu2zap Bangalore, South India http://members.xoom.com/ggrk/