I wouldn't be able to lift that up to the room.....I have a chronic pain condition, hence using for meds. It really would be impossible, partner not always around to help lifting and filling it up etc. He is a plumber/electrician though so I am wondering if we could fit a reverse osmosis filter system to the water supply? I am not sure on the PPM .... we have a water softner and the lime scale is very soft, high calcium content. When he gets home will see what he thinks too.... having done a bit of research there are systems ranging from £50 to 2K to filter and reverse osmosis. I just went to the product page, the manufacturer states 'use reverse osmosis water'.... doesn't say anything about distilled but am guessing the process does the same thing.... removing the 'nasties' out of the supply?