POLYBIO Poly Filter PAD 4 X 8

In all my 35 years of fishkeeping, this is the best mechanical filtration media that Ive ever used. And even though they recommend having 100% of your water flow to go through the poly, Its got my 20 gallon display with 10 gallon sump crystal clear with less flowing through it. This is truly all Ill ever use.

Water is crystal clear with these as a water cleaner before the filters

I love this product! I overstocked my 50g cichlid tank and as a result had a constant problem of Ammonia spikes and very high Nitrate levels. I do up to 50% water changes weekly but the problem would quickly return within a few days. I heard about Poly-Filter on YouTube and thought I would give it a try. After the first 24hrs of putting the entire 4X8 pad in my wet/dry sump, the Ammonia went from 10ppm to 0. My Nitrate was also reduced by about 50%. I did another 50% water change which reduced the Nitrate to about 5ppm. After a month, I have no more ammonia spikes and my nitrate have been holding steady at about 5-10ppm. If you overstock, which a lot of cichlid owners do, you have to try this product!

This is fantastic- and you can even see what it is removing from the water!

Excellent product and amazon seller

Great

This product is pricey, if compared to the standard activated carbon. However, not only does it outperform activated carbon as a chemical filter, but adds the benefits of physical and biological filtration. In power and canister filters, polyfilter elevates performance by orders of magnitude.

This is a must to clear the water of any medications used recentally or at least once a year to make sure to pickup anything the skimmer cant or whatever else you use. There is no substitute for this product anywhere. Truly a perfect filter that never takes out minerals or any needs life just phosphates and protiens, amonia etc. that you want to remove. IT lasts a while with color changing properties to aid in evaluating when it is full. Never leaches back into the water ever! A++++++++++

This is by far the best filter pad/sponge! It even changes colors to show you what it’s removing from the water!!

Perfect