Aquatic Life Reverse Osmosis 10-Inch Mixed-Bed Color Changing Deionization Resin Filter Cartridge for RO/DI System Units, 3-Pack

This works so well I really can't say enough good about it. A little pricey but it's effective.

I've been keeping reef tanks for over a decade and in that time have learned a lot about water quality. Where I live we have hard water and the quality is rather bad. I also have a whole house water softener and while even being on city water without a softener everything in my home will run red from iron. I know rather sad... you can't expect better quality water from our cities anymore. I realized regular 4.5 pound refill bag was empty a little to late to wait on ordering one as the shipping is rather slow. At that time my TDS meter TDS = Total Dissolved Solids was already showing around 10 and this was the best option I could find on Amazon with quick shipping and price but more expensive than only buying the resign separate from the containers and refilling yourself. This DI-Resin brought my TDS right back to 0 and I've experienced no issues after using it for several months and I'm still using my first replacement filter. The life the product seems to be in along the same lines as the other brand I usually use. Thumbs Up - Great Product

Great product and customer service

I can’t say for certain what the issue is with the cartridge . While they fit, I kept getting 2-3 tds. Got a refillable cartridge and filled it with the SAME resin and finally getting 0 tds.

I purchased these RODI filters to put in Frigidaire canisters to use for washing my vehicles. What a difference they made for removing the water spots on my car, our water has Lots of calcium and mineral deposits in it which left an insane amount of water spots on my vehicles after washing ( I couldn't dry it fast enough) I'm using a 5 micron carbon pre-filter and then 1 RODI filter and what a difference it's made! I can literally let my car air dry with No water spots! I've used 1 filter so far and after 10+ uses it's still performing great. I plan on adding a 1 micron pre-filter to extend the life of the RODI filter. All in all I've made a car wash water filtration system for under $100.00 that works perfect with no reduction in water volume or pressure. I would recommend this product!