Pisces Pre-Filter Foam Cube - Twin Pack - 8 x 8 x 8 Inch

The Pisces Pre-Filter Foam Cube is designed to work in conjunction with your pond pump to provide ...

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eBayTWIN PACK PRE-FILTER FOAM CUBE 8 INCH KOI POND MEDIA SQUARE SPONGE 8"" x 8"" x 8""
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B&QB&Q - Twin Pack8'' X 8'' X 8' Pre-Filter Foam Cube For Pond Pumps
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Product Information

Full details

The Pisces Pre-Filter Foam Cube is an essential filtration upgrade for pond owners looking to extend the lifespan of their pumps and improve water clarity. Designed for those seeking a low-maintenance way to capture debris and foster beneficial bacteria, this system acts as a mechanical barrier at the pump inlet; however, users should note that the large size requires sufficient space within the pond for optimal placement.

All features

BrandPisces

Extended Product Information

FAQs

Can I use this with any pond pump?

The cube is designed to be compatible with most standard pond pumps, thanks to the customizable removable inserts.

How often should I clean the foam?

Cleaning frequency depends on your pond's debris load, but a general rule is to rinse it whenever you notice a decline in water output.

Will this kill the beneficial bacteria if I wash it?

If you rinse the foam using pond water, the bacterial colonies will remain largely intact. Avoid using harsh soaps or chlorinated water.

Can I trim the foam if it's too big?

Yes, the foam can be carefully trimmed with a sharp utility knife if you need to fit it into a restricted space.

How long does the foam last?

With proper care and regular rinsing, the foam is designed for long-term use, though it will eventually require replacement as it degrades over time.

Troubleshooting

Pump flow rate has dropped significantly

The foam cube is likely saturated with debris. Remove and rinse the foam thoroughly to restore flow.

Foam keeps floating to the surface

Ensure all air is removed from the pores by squeezing the foam under water, and verify the pump weight is sufficient to anchor it.

Pros and Cons

Pros

  • Significantly reduces the need for frequent pump maintenance
  • Large surface area improves water quality through biological filtration
  • Adaptable inserts accommodate multiple pump brands
  • Durable construction handles high flow rates
  • Easy to remove and rinse for quick maintenance

Cons

  • Requires regular rinsing to prevent flow restriction
  • The 8-inch profile may be too large for very shallow or small water features
  • Blocks are bulky and may require hiding with pond decor

Setup, Compatibility & Care

To install, remove the necessary foam inserts from the center of the cube until the fit is snug against your pump's inlet nozzle. Ensure the cube is fully submerged to prevent air pockets from affecting the pump motor. For care, monitor the water flow rate; when you notice a decrease in return pressure, remove the cube and rinse it in a bucket of conditioned or pond water—avoid using chlorinated tap water, as this will kill the beneficial bacteria living inside the foam. Squeeze the foam gently until the runoff is clear, then reinstall it.

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