Filters stinky well water.
349130
We have terrible smelling well water. Even going through 2 exterior filters it continued.
This filter took it away 80% and some days 100% out of the shower head.
866016
Bought them earlier this year and used up the ones I had first, which were OK.  Opened the batch, first filter had water in the bag and when I shook it water came out of the top of the filter.  Same with all the rest of them.  Everyone had water in the filter.  Will never buy them again.
3928326
there is a problem with the filters, and sometimes the water has a weird after taste. i have 3 kids and I'm not sure i am providing them safe clean water while using this product. Ended up installing a serious under sink filter.
4442736
Water doesnt taste good coming through this filter. Air is shooting out of nozzle and water is leaking out of nozzle. Would never buy again!
4012660
Used the blue filters in the past and had great water and bought two of these and my water out of the refrigerator tastes like it's got a chemical taste.  I'm very disappointed in this two pack.  I noticed these filters are made overseas where there is no Quality Control. So if you like contaminated water that tastes of chemicals buy this filter.
239787
I like the convenience and cost-effectiveness of buying the 6-packs of these filters on Amazon rather than buying 3-packs at the pet store. However, this type of Marineland filter gets clogged up waaaay too quickly.  I wish I had chosen a different filter to begin with because now I'm stuck buying these unless I want to buy a whole new filter again.
3569839
Multiple filters in the pack were bad. They didn't filter the water at all (tested with the meter that comes), and made the water worse.
4616698
Worked for my filter. Very expensive for a water filter.
1464322
I've used these  filters before and was very happy  but this filter made the water taste awful.  I followed all directions to the letter but the water tasted like chemicals.  Sent it back.
4335282
Great filter, bad finishes. The water is well filtered. The plastics are not well designed. The seams under both sides of the handle cut into your hand.
510351
I used to use a Brita filter, but broke it and wanted to try the Zero Water system since the ads were so convincing. This is a horrible filter! It makes the water smell awful, and it definitely has a weird taste....similar to fish. For awhile I thought the smell was coming from new silicone ice cube trays,but that is definitely not the case. I went back to Brita, and have perfectly tasting water again.
2927884
Measure the water quality after using this filter and is not good....LE FALTA ALGO...my baja calidad
3233779
After installing this filter I now get white particulate matter floating in my water.... gross
3511811
The filter works fine but had to flush a lot to get rid of funky taste.  my original filter lasted a year.
3316944
These filters smell as awful as the ones that come with the unit.  I think it might be the antimicrobial spray.  I just wish I had known I'd be airing out what might be carcinogens into my house once a year before I bought this unit.  They should either quit applying the microbial coating or find one that is not noxious.
850411
Won't buy again. Water even through this filtered tastes terrible.  Yuck.
1406463
Stupid design.. Filters sticks up a3/8 of and inch so it doesn't completely empty so i always have stinky gas to dump