PirateLove
New member
I recently tested my water and it was showing 16tds and ordered a new membrane ($40) because I had just replaced all of my other filters. Now I realize I was using my TDS meter wrong and the real result of my water was 0tds. I replaced the membrane an hour ago. Should I take it out and put the old one back in since there was nothing wrong with it and keep the new one as a replacement for later? Or can I not since I have already ran water though it. What would you guys do??