Poly Filter Poly-Bio-Marine for Fish Aquarium - Works for Freshwater and Saltwater Fish Tanks - Filter Aquarium Media Pads - 3-Pack of 4in x 8in Pads

This filter media is really amazing! It filtered out all of the tannins that were making the water brown and also stopped the brown algae from reforming. Love it

Amazing short term fix.

This stuff has been a game changer in regards to the maintenance of our freshwater tank. My son has a 10 gallon freshwater tank and I was having to change the water every few weeks or change out the filtration substrates every few weeks but one of the staff at the local aquarium shop suggested I use this. I don't know how it works but it filters out harmful chemicals and organic material from your tank and keeps the tank clean for much longer. I place a small strip (1/2 inch thick) of it in the filtration system and change out weekly. It turns color to indicate the filtered contaminate. It's not very expensive and it will last at least a couple of months depending on the size of your tank and filtration needs. fHighly recommend.

It’s Real hood product for aquarium filters

Best filters on the market by far! Some aquarium places I've been to carry these and sell them for 15 bucks for on so this 3 pack is a great deal cheaper... these filters helped me when I realized you cant get replacements for my filter kit that came with my tank... also I have well water and struggled with acidity so had to use sachem neutralizer to stabilize it and these took all the bad out of the water and the phosphates etc out of the water caused by the sachem product and helped me stabilize my tank. They also help with natural waste and ammonia! I have a slightly over stocked tank so added air stones and switched to these products and I have no issues! I do a water change and vacuum every two months and replace this when I do it. Keeps my tank crystal clear and balanced! Best product ever!

I used this product when I had my first reef aquarium 30 years ago, and I'm using it again now since I got back into the hobby. A lot has changed but PolyFilter is still around, that longevity says something. Mostly, it removes excess organics from my system, and I replace it every 3 weeks or so. Before I first started using PF on this new system, I checked my water for metal contaminants by Triton Labs testing. I had some excess tin (traced to some prematurely rusting pump screws), and it appears that PF subsequently removed that as well. It will remove quite a few contaminant metals, such as copper, lead, etc, but not all; for example, it will not remove lithium. Seems to have no effect on desirable cations like calcium, magnesium, potassium, or strontium.

This filter is fantastic!! I don’t put it in my cannister filter - I just cut a piece off and drop it right in the water in my freshwater aquarium. It works great and helps me buy some time if I need to do a water change but don’t have time to do it right away. I like to use it directly in the water so I can “see” whats going on by the color it turns. I also use it the same way if I need to remove medication. One thing to keep in mind tho is if you’re adding ferts or minerals, the package says to wait 12 hrs before putting it in. I usually only use it before water changes or after meds so don’t have much personal experience about this except that it will remove Seachem Excel if you use it at the same time. I can’t say enough great things about this product. It’s a valuable item to have in my arsenal for my aquarium. Plus Amazon offers it at a much better price than my LFS.

I use a few different medias and have top three I love but would not say one is better . This IMO is one of top three as these pads can be cut placed ANYWHERE in filter and they absorb waste / junk , water does NOT have to pass through them . When brown I squeeze the junk into a container to use on my terrestrial plants for fertilizer ( freshwater tanks ) . With ALL media I play it safe by placing it a couple of days in a container of water before putting it in filter , I then rinse it in cold water and place it in filter and no PH change , etc even my delicate shrimp thrive .