Tds ਮੀਟਰ ਅਤੇ ਕੈਮੀਕਲ ਦੋਨੋ ਐਮਾਜ਼ਾਨ ਤੋਂ ਖਰੀਦਣ ਲਈ ਲਿੰਕ https://amzn.to/3bpZ5Hn Reverse osmosis (RO) water filters are not good for health according to a recent warning issued by the World Health Organisation (WHO). RO filters not just kill the bacteria, but remove all salts and essential nutrients such as calcium and magnesium. R.O. water Live Test TDS & PH