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Poly Filter 4 x 8
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Poly Filter 4 x 8

Temporarily Out of Stock: ETA 2-3 weeks

Item #: PB1111

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MSRP: $8.95 Save: $1.96 (22%)
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Quick Overview

The POLY-FILTER is for filtering and purifying both fresh and salt water aquariums. It is a formulation of a special patented material bonded to a synthetic matrix. By means of a unique proprietary process, the POLY-FILTER is made...
Product Description

Poly Filter 4 x 8 Information

Part #: PB1111

The POLY-FILTER is for filtering and purifying both fresh and salt water aquariums. It is a formulation of a special patented material bonded to a synthetic matrix. By means of a unique proprietary process, the POLY-FILTER is made impervious to salt and is also organic loving to certain materials. It can absorb and adsorb contaminants and other toxic materials found in nature or added to fresh and salt water with or without fish and invertebrates. Medication added to fresh and salt water aquariums for treatment of diseased fish will automatically be removed by the POLY-FILTER after serving their intended purpose before the medication can produce a toxic effect on the fish.

The POLY-FILTER is non-toxic and harmless to biological filtration because it allows a sufficient amount of ammonia to reach the biological filter in order to sustain the bacteria culture. The POLY-FILTER provides a supplemental means for removal of ammonia when the biological filter is unable to break down the excess ammonia and its concentration increases rapidly. Then the POLY-FILTER adsorbs the excess ammonia while the biological filter readjusts to higher ammonia input levels. Changes color when exhausted. 4" x 8".

Operating Instructions

Freshwater Application:
Add Poly-Filter to any holder or apparatus at any time.

Establishing Marine/Reef system:
Add Poly-Filter so water can pass through it.
For Maximum Filtration: Eliminate all water bypass.

Poly-Filter in established marine & freshwater systems:
  • Conventional power filter: Place Poly-Filter on bottom plate. Cover with gravel or floss. Do not restrict flow.
  • Plastic undergravel filters: Place Poly-Filter on top of the undergravel plate. Cover filter and plate with gravel.
  • Canister-type power filters: Place Poly-Filter in the chemical filter compartment. Add floss according to manufacturer’s instructions.
Medication removal (parasite and antibiotic treatments):
Remove Poly-Filter from water before any type of medication is added. Follow medication instructions issued by the manufacturer. After treatment is complete, place Poly-Filter back in the water to remove traces of medication. Test water for safe levels. When safe, remove discolored Poly-Filter, dry and save for next medication. Place new Poly-Filter in the water for removal of conventional organics and water purification.

Adding vitamins and trace elements:
Remove Poly-Filter from water before adding vitamins or trace elements. After 12 hours place Poly-Filter back into water. Poly-Filter will not remove calcium, magnesium, strontium, barium or alkalinity supplements. Poly-Filter will not remove trace elements included in marine salt mixtures.

General maintenance comments:
Poly-Filter turns color when removing medications. Aqua to Dark Blue: Copper or Copper salts. Orange: Iron. Bright Red: Aluminum. Bright Yellow: Ammonia, Amines or Solvents. Dyes: Color of the solution when added i.e. Methylene Blue: Pale Blue. Malachite Green: Light Green, Tannins/Humic acid: Dark Brown, Organic Wastes: Light Tan progressing to Dark Brown. Poly-Filter extends time between water changes. Add de-chlorinated water to make up for evaporation loss. If pH shifts below acceptable level change water and add a new Poly-Filter. Heavy slime producing water conditioners can surface coat Poly-Filter and interfere with absorption performance. In marine water, soak in 3% hydrogen peroxide then rinse (in freshwater) well. In freshwater soak in 10% marine salt water solution then rinse (in freshwater) well.


4 x 8 filter pad


No Warranty
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Poly Filter 4 x 8 Reviews

Average Reviews

Customer Reviews

Poly filter Product Review by DIANA SILVA (Posted on 3/18/14)

Comments: This stuff is great! Have a small fresh water tank and 90g salt water. Had some minor algae issues in both, but no more! Both tanks showing decrease in less than a week! Definitely will continue to use. Had slight fluctuation of pH in my saltwater tank but now reading better than before! Great produce and easy to use.

Happy Water Product Review by NANCY MEIGHAN (Posted on 3/8/14)

Comments: I have used Poly Filter for years. The poly filter keeps my freshwater tanks in check. Filters out all the bad and leaves the good. Just read the back and know the color changes.........I change mine once a month. Very happy with this product. MarineDepot web was so easy and great service.

Poly Filter Product Review by Jojo (Posted on 2/26/14)

Comments: Every aquarist should have some in stock for the 'bad moments'.

I've used this for QT to make sure ammonia and other containments are always in checked.

I've also used this to remove copper from my tank after treatment of ICH and it did a great job.

The different colors that it changes is awesome in telling you what was removed. When I removed copper, it was a dark blue. Other times, it'll just be a brown for organics.

As to run 24/7, it would be an expensive filter media, but you can leave one in your tank just you need to setup a QT quickly.

ammonia treatment Product Review by seahorse (Posted on 2/26/14)

Comments: i had been fighting ammonia for about a week. levels between 1-2ppm. in 2 days the level is 0. adding bacteria wasnt a fast enough solution and it beats doing a complete water change.

great product Product Review by JAY (Posted on 2/26/14)

Comments: I have been using this product for years. It is a very good micro mechanical filter. I use it as the last mechanical filter in my sump. This helps eliminate air bubbles in the tank return.

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