Bulk Pack Aquarium Reef Color Changing Deionization Resin Bag (RODI) for 0 TDS/PPM Wate | Deionized Reverse Osmosis Filter Media for Fish Tank, Reef Tank & Other Aquatic Life (5 LBS)

Works well and the 5 lb bag is a great way to keep some on hand. I don't like that the color changes from green to purple. It's difficult to tell how much has changed color without a flashlight. I have terrible city water, but this works great to get clean aquarium water. Best success I've had with DI water. Fish love it!

I had been buying DI resin from BRS for several years. After using this product for a while, it does what it is supposed to do, which is to keep my TDS reading at 000. Good price.

Seems like a lot of the resin is already brown?Also, the "baggie" was burst open and I had resin all over the inside and outside of the fed ex bag.

This is the Second time it happened this year, I did give them another opportunity because I have buy some before never had a issue, I cannot relied on this product for my fish and coral.

Did lower my water TDS from 300 to 50. It didn't last long. At the most 1 week. Change from green to blue instantly and hasn't change since. I would not buy this again and try other brands.

It does what it says, only get about a 100 gallons out of my RO/DI Buddie but it works.

works as expected

The resin was not blue as described it was green and came in a lightweight zip loc baggie... it worked...produced zero TDS however it did not change color and I didn't figure it out until it had fouled the entire 55 gallon storage tank. Called phone number listed. It is a person's phone number not a business. Left message. Attached is photo of resin in trash can that was removed @ 4 TDS...exact same color as the new in the bag....