Rodi unit after 6 months reading 1tds

[Rickybobby]

My rodi unit has been always 0 tds out of the unit. I run a 5 stage spectrapure. This week I made a lot of water for new tank. Did a membrane flush and now my tds gauge goes back and forth. Between 0 and 1. My water in from the well is 320tds. Is it time for a new membrane already? The di resins still look the same colours as when they were new. What’s acceptable tds for a mixed reef

 

[threebuoys]

1 is minuscule. i'd wait until its a lot more than that.