iSpring FA15 10-inch Inline Quick Connect 3-Layer Alkaline Replacement Water Filter Cartridge with Mineral Balls, Calcite, and Corosex for Reverse Osmosis RO System, White

I've had my 5-stage iSpring for several years and have been pleased with the taste. While I think we're not meant rely on our drinking water to get our minerals, sometimes I get questions of concern from guests. Word to the wise: best not to even mention that your water filter is RO. Sometimes people think it's distilled water. Ugh. Anyway, I bought and attached this sixth alkaline stage and did a before and after taste test. The 'before' was just as good as ever. The 'after', now going through the filter, has a slight brightness to it which, while not a huge difference, is to my taste buds preferable.

Really good filters from this brand / not altering the taste of water as from previous company which i used and gave me a lot of debris at the outer part of filter

Perfect but little on pricey side to other options.I wanted something to add to my 6 stage RO system which comes out at zero for my reef tanks. As I now live in a very hard water area with no reservoirs the water smells and is awful up this way.Added this to the side to which I divert the water for drinking. Comes out at around TDS 82 perfect and even better with a slice of fruit.

Works with my 6 stage reverse osmosis watering system.

There are 2 types of connecting holes for this cartridge, thinner screw variety and a fatter 'easy-click' type. This is the latter, unfortunately my ispring unit was the former, so they are incompatible.Othwrwise a great system and the seller sent over spare parts a week later.

Good

Using this item on reverse osmosis 7 stage , measured water TDS 165 = perfectPush fits comes integrated not like on another`s brands you need to buy separately.Thank You

Definitely add something. From 10ppm to 130ppm and also on pic you can see the test results. Ph and carbonate changed rest of same as without.