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.

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°.

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

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

Value of money

Works with my 6 stage reverse osmosis watering system.

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

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.