This morning I was wondering why my RO was taking so long to make water and I took a look at the DI membrane and it was redish and very ugly looking therefore I wiped the dust off the TDS meter and measured a whopping 22 TDS out of the RO/DI unit :shock: . I guess these things need to be changed out sooner then after 600 - 800 gallons of production water.

I called AQRS and they suggested increasing my RO/DI from a 4 stage to a 5 stage so that I can swap DI cartridges since my incoming water is 325 TDS and I also ordered another Carbon, Sediment and DI cartridge.

I hope this was the culprit although I feel dumb since Ken had already told me to check my RO unit :roll: .

Looks like I'll have to change my DI cartridge soon after I fill up my 375 since they recommend swapping them out every 400-500 gallons. I'll just have to check and see.