Pond Sludge Filter Bag 400 µm – Pre-Filter for Sludge Vacuums and Pond Cleaning

Fast Coarse Cleaning With Maximum Water Flow

The WINKLER pond sludge filter bag with a 400 µm micron rating is particularly well suited to quickly removing coarse pond sludge, leaves and organic debris. Its highly permeable filter fabric lets water flow through especially fast, so large volumes of water can be filtered in a short time.

The 400 µm filter bag is mainly used for the first clean of a heavily contaminated pond. Coarse debris is reliably retained while water flows through almost unhindered, significantly cutting cleaning time.

It's especially effective as a pre-filter combined with finer filter bags. While the 400 µm bag removes coarse contamination, downstream fine filters can work far more efficiently and need cleaning less often.

Typical Applications

The filter bag with a 400 µm rating is particularly well suited to fast coarse cleaning and applications with high water flow:

• Heavily contaminated garden ponds
• Koi ponds
• Natural ponds
• Swimming ponds
• Cleaning work with a sludge vacuum
• Removing leaves and plant debris
• Coarse pond sludge
• Pre-filtration ahead of finer filter bags

This robust filter bag is excellent for fast dewatering when coarse sludge builds up. Discover further variants and matching accessories in our Home, Garden & Pond range.

How It Works: Fast Pond Cleaning in a Loop

Getting set up takes moments:

1. Contaminated water is pumped into the filter bag using a sludge vacuum or pump.
2. Coarse debris from around 400 µm upward is retained in the filter fabric.
3. The cleaned water flows straight back into the pond.

The 2.50 m length creates a large filter area for especially fast water flow. This allows even larger sludge volumes to be filtered quickly without the filter bag clogging.

The 400 µm filter bag works especially well as the first cleaning step in pond maintenance, quickly relieving the load on downstream fine filters.

Easy Handling During Pond Cleaning

Thanks to the open mesh structure, collected debris is especially easy to remove after coarse cleaning. The included, reusable cable tie allows the bottom to be opened quickly, so leaves and coarse sludge fall out almost by themselves.

A key benefit of the 400 µm variant: cleaning the fabric is extremely quick. Because coarse particles don't lodge deep in the pores, a quick rinse with the garden hose is usually enough. Simply turn the bag inside out, rinse and the highly permeable bag is ready for the next use. The robust material also handles sharp plant debris well, keeping it ready for large clean-up jobs.

Built for repeated use, the filter bag is a sustainable, cost-effective way to remove and dispose of pond sludge.

Which Filter Bag Is Right for You?

The right micron rating depends on how contaminated your pond is and the cleaning result you want to achieve.

The 400 µm filter bag is ideal for a fast initial clean and is often used as the first cleaning step before finer filter bags come into play.

Your Benefits at a Glance

• Very high water flow: Large volumes of water can be filtered in a short time.
• Ideal as a pre-filter: Removes coarse contamination and eases the load on fine filters.
• Reusable: The robust filter fabric is easy to clean and use repeatedly.
• Secure fit: The opening is optimised for DN100 fittings and includes a handy drawstring.

WINKLER Pond Sludge Filter Bag: Technical Details

Advice From Our Filtration Specialists

Is the highly permeable 400 µm variant the right solution for coarse contamination in your pond management? Our filtration specialists are happy to advise you personally, helping you find the perfect combination of high flow speed and effective particle retention.