POLYBIO Poly Filter PAD 4 X 8

These really work great product

Effective and great pricing

Product is as expected.

I’ve been using this product for years I highly recommend it over any other filtration material

Works as advertised

Sometimes we get a bit distracted from our tanks and they may go a bit neglected. If I miss a water change or two, Ill throw this into my filtration system and it polishes the water right up. Absolutely great product.

This stuff works great to filter the bio waste in my reef tank. I use this with a tri-layer prefilter and get great results.

Perfect

I usually use this to get rid of copper when treating my tank with Cupramine for ich issues. They turn a dark blue when exhausted of absorbing copper. They I put in another one until it doesnt turn blue anymore. Therefore I know that the copper has been absorbed. Also if I dont know whats in my tank and need them to absorb any toxins/heavy metals - I can see by color change if there is any. Otherwise, they are more expensive than your carbon but the color change and absorption is very informational and worth the cost when needed for absorbing copper, heavy metal, etc.

Perfect