Membrane Upgrade Kit 150 GPD 2:1 Ratio

I love 0 TDS

I used spectrapure for years before for my reef tanks and decided to see if some of the cheaper filters could do the same thing for a lesser price, but I went through 3 times the filters and never reached the 0 tds I was looking for, recently decided to replace everything with spectrapure and hit my 0 tds immediately, will never try anything else again, Hopefully these will last as long as the ones I used a few years back