iFilters Resin Media Replacement for Water Softeners - 0.25 / ¼ Cubic Foot (CuFt) | 100% Ion Exchange Quality Cation | 8,000 Grain Capacity | Certified (MED-CAT-025)

Excellent product. Replaced the used up resin beads and immediately had soft water. Repeat customer.

The resin media worked perfectly to recharge my portable water softener.

Product seems good; however, the resins seem slightly smaller than the resin I had leftover from my last rebuild. Very good price and packaging. So far so good:)

The softener cartridge for big blue housings is ridiculously expensive for what it does. You can buy and empty cartridge housing and fill it with this for a fraction of the cost.

I purchased 1/2 CuFt of resin to increase the capacity of an underfilled softener resin tank. Shipment was quick, and there was no damage to the bags containing the resin, which has identical appearance to the resin already in the tank. The only reason for less than 5 stars was that the price would have been lower elsewhere, but I needed it quickly (and it was delivered quickly). Note that when adding new resin, a small amount of leaching- fractured beads/residue- is normal and to be expected when water is first passed through the tank. After connecting the softener tank, I ran water from a faucet near the connection. The water started discolored (gold/tan), but after about 5 gallons ran completely clear. Again, this initial discoloration is to be expected with fresh resin, and I cannot say whether it was from the resin I bought here, or the resin (also fresh) already in the tank. I anticipate no problems with the resin.

Perfect and easy to use. Water super duper soft. Recommend this at least once a year if you have very hard water with harmful minerals like we do

This resin does exactly what it's supposed to do - it exchanges sodium ions for calcium and magnesium ions. This is the basis by which water softeners work! As the negatively charged resin grabs positively charged ions (cations) like calcium and magnesium, it releases (or exchanges) positively charged sodium ions. When the resin can hold no more calcium and magnesium, it's time to recharge with a very high concentration of salt solution (brine). This knocks off the calcium and magnesium ions that then get flushed away and are replaced by the sodium ions, and the process starts again. So yes, TDS can remain the same or even INCREASE during this exchange process and this resin worked wonderfully to bring my 16,000 grain portable softener back to life.

Do not buy these!! Removed old resin from tank filled the complete 9.5 liters brand new from the bag water was registering 265 ppm. I thought it was odd cycled water again through the tank shot up yet again to 287 ppm. Did not work at all.

Great price, changed the media in my softener and happy with product, it's been running for 2 weeks now.

Will see how long it lasts