I have just been looking at my prefilters this is the first time iv opend them on my purefreedom RO you carnt see into the the left and the middle one then the right one near entry to the RO is clear..
anyway my left prefilter before membranes the water was cloudy dark colour is that how its sposed to look before it goes into membranes??
and also the first entry prefilter had little blue specks in the water