Hi guys the speed that my tank 350l fills up is painfully slow.Im living in a hard water area with a tds reading of 400ish [high i know] with a 300gpd REVERSE OSMOSIS RO UNIT and it is taking on average about 10 hours just to get about a quarter of a tank. im also getting ALOT of waste water. And just to add im on a water meeter. I know i only have a basic system but is this normal. Thanks.