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

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.

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

Be sure flush it for 5 mins before use. Added 20 TDS to final output and ph went from 6 to 7.5, for aquarists, GH is 5° and KH 8°.

Does a great job, but would benefit from having a zinc component.

Value of money

Works with my 6 stage reverse osmosis watering system.

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.

This is very very bad I couldn’t fix without leaks and even when attached it’s not fit well In the end I break it apart because the connections can’t be removed I will not buy this thing again

Working great so far and yielding 0 ppm

Como siempre excelente 👌

Product cane as described

Why oh why do manufacturers not list their items properly? The unit comes with a "quick lock" connector already threaded into it, so you can only add the elbow and T-bends to it, I am dumbfounded why they did this and not provide the unit "naked" to which you can add your own connectors from an already plumbed system? If there is a way to remove the " Green" thread connector please enlighten me so I can remove it and connect it with the normal threaded version of RO connectors.