Currently Aquaticlife 4stage from Amazon. I’m waiting on my results from tap and rodi. I’m sure it’s not working as it should. I’ve only pumped out about 75-80 gallons from the brand new unit and had to change the di filter. I’m probably going to upgrade to a 6 stage from bulk reef supply. Also, I suspect my water pressure is low. Having that checked Monday.What RODI unit are you using?
Do you have a copy of your local tap water quality report? Could that test be picking up chloramine?