Review on Enhance Water Quality with iSpring FD15 DeIonization Filter for Aquariums by Brett Jarvis

After reading some reviews I was hesitant to order this one like most of tell them the resin didn't reach 0ppm. However, I noticed that most of the reviews are outdated and not very up to date, so when in doubt, I accepted and ordered ispring hoping they would replace the resin. I also ordered a spare resin from another seller just in case. I installed it and immediately checked the water coming out and it showed 0ppm, so I'm guessing iSpring either changed the resin that came with it or I got a different batch. Keep in mind I was at 14ppm RO so I knew it wouldn't take long to get down to 0 but this is what I need for my reef tank. It is worth noting that the raised arrow on the canister itself indicates the direction of water flow. It's really hard to see, but he's there.