Kolar LabsDI Color Changing Deionization Resin – for Fish Tanks, Ponds & Aquariums, Reef Aquarium Grade (567 Gram, 1.25lbs)

Great quality stuff and probably the best value out there.

Good do DI resin will buy again. Cheaper to replace your old DI filter with the resin.

The resin allows me to refill my DI cartridge at half the cost to replace. I use it in AquaFX barracuda, but it will work on any refillable cartridge, ones that the bottom screws off. Simply unscrew the bottom, trach the old resin, rinse well and refill with this bag. The bag was a perfect size to refill once.

Great product and great price but seriously lacking in health and safety warnings as well as handling instructions. Always wear rubber gloves when handling DI resin.

Have tried a few other brands from here on Amazon nothing else seems to last as long. Switching back to this brand.

works as it should

I originally gave 5 stars because it deserved it. Not now. See below.Update July 2019. This is the last time I will buy this product. Like another reviewer stated the bad isnt 1.25lb. I bought this 3 times though Amazon. This being the third. The other 2 times I had to pack it so tight in the ro housing I still had a little left over. This recent time? A joke. Not only was there 1 inch space after filling it. After only making 75 gallons half the resin has already changed color. Used to get hundreds of gallons easily out of a canister. This is a definite avoid at all costs. Waste of money.

Good to have the color changing resin this time.My water quality must be bad .It didn't last very long between having to change.I will try a different resin to see if that makes a difference