Black Knight 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.
Whichever installation design you choose, the method of water introduction to the chamber will have an effect on the efficiency of the brushes.
Generally the water should flow into the chamber at slow speed rather than being jetted in under pressure.
Water travelling at high speed not only causes turbulence, which will disturb settled material, but it can also wash off some of the waste which has been trapped successfully in the brushes.
Before purchasing Black Knight brushes, you should decide what type of filter design will be best for your pond.
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 brushes 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.
How to use Black Knight Filter Brushes:
If you have a small pond with a few goldfish and a couple of koi then a single chamber with three to six lines of brushes will be ideal.
For a more demanding situation, it will be necessary to use a much larger chamber or to link two or three together.
These can all contain brushes or you can use them in the first and second chambers and then use a stone medium such as Lytag, Canterbury Spar or Alfagrog in the last chamber.