I use BRS resins. I get around 100-150g of water before I have depleted the Anion resin. Well water is not the same as municipal water. With all the treatments and open to air filtration there would be little co2 left in the water it would have equalized with the air around it. Silicates are still possible but not usually as high. I still believe my issue and
@kpreslicka are one of the two. I need to have an icp or other test done on my water out of the ro membrane just not sure what is the best route to go, one day I might get around to it. Currently just got really good at repacking resin canisters. I will also start regenerating resin soon.