Help. please! We want to replace the old and inadequate water filter we have, but.... Please, have a look and do tell (from quality to costs and onwards): https://www.amazon.co.uk/s/ref=sr_p...ds=propur water filter&ie=UTF8&qid=1505167032 https://www.amazon.co.uk/dp/B00519A...DZTSXMB0HNA8Q9DA0&ie=UTF8&qid=1505167032&sr=3 https://www.amazon.co.uk/dp/B005193...DZTSXMB0HNA8Q9DA0&ie=UTF8&qid=1505167032&sr=1 What about the filters themselves, the running costs, how long do they last/how many litres can they filter safely etc.? I read what Michaela posted on the manufacturer's website but real life conditions can be different... Cheerio!