Pond Filter Media » Black Knight

What are Black Knight filter brushes?

Black Knight filter brushes are made from the very highest quality Hydrotek polypropylene twisted into two stainless steel wires to form a cylindrical brush with a loop at one end for hanging. The other end is capped with a plastic knob for safety.

They last indefinitely and are the easiest to use, most efficient and most cost-effective pond filter medium you can buy.

Our brushes are used in filtration systems in fish farms, hatcheries, public aquaria, domestic fish ponds and research institutes in this country and abroad. No other filter medium is as widely used or has been as extensively tested and proved.

What are the benefits of Black Knight filter brushes?

They: are very easy to use do not need replacing are lightweight don't clog up as many other materials do are non-toxic are very easy to clean never wear out are by far the best medium for removing suspended particles of waste cost less than any other material that does an equivalent job are tried and tested all over the world provide a massive surface area for biological colonisation do not require expensive support frames

Spawning Brushes

Pack of 2 specially designed soft green spawning brushes each brush measures 1.5m by 140mm diameter.

Spawning is made easy with the help of these specially designed brushes. The breeding season is normally from April to July depending on the weather.

Place the Spawning Brushes just below water level, one above the other, at the edge of the pond, this will
encourages your fish to spawn, usually in the early hours.

Spawning takes several hours with the eggs sticking to the brushes.
After spawning, separate the brushes from the broodfish to avoid the eggs being eaten.
Place the brushes in filtered water of the same temperature and the fry will hatch in 3-6 days.

Small fish should be kept separate until they are large enough to be introduced to the pond.

Please Note: These spawning brushes are made from a soft material that won't harm your fish. DO NOT USE filter brushes for this purpose.

Vortex chambers are good for settling out heavy waste but much less efficient with the lightweight particles. Have you noticed that even though you get a lot of waste in the bottom of your vortex, you still find that the subsequent chambers get very dirty too. This is the very fine particles that do not have time to settle in the vortex and so they get drawn through the transfer port into the next chamber.

How do they work?

Black Knight brushes work in three ways. First, they physically trap the large particles that cannot pass through the close weave of the interlocking filaments. Secondly, the filaments have a static charge that ‘grabs’ any small particles that are flowing by. This charge holds onto the waste until you do your routine cleaning. Thirdly, after you have been using the brushed for a few weeks, the massive surface area of the brushes becomes home to millions of beneficial nitrifying bacteria that will help to purify your water biologically.