RODI Membrane

[Sojiiro109]

Howdy fellas. I just purchased a 200GPD 7-stage filter from BRS last month. Its probably made around 300 gallons so far to fill up my S1000 and some. I have a whole-home filtration system that cleans up the water coming into my home which in turn feeds the RODI so it should be cleaner the most, however the membranes already look like this. Is this normal? I've never owned an RODI before.

Thanks in advance.

 

[Tahoe61]

What's the TDS going into the filter?