Description
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.
Features:
- 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
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.
Recommended spacing
The distance between the brushes should be as close to the recommended spacing as possible but the width of the chamber should be divided by the number of brushes required to give the spacing (see How Many). For instance, a 31 1/4 inch (79.5cm) wide chamber would be divided by ten when using 4 inch (10cm) brushes, to give a spacing of 3 1/8 inch (8cm) between the brushes.
How to hang your brushes
We recommend the use of 1 inch (25mm) diameter plastic pipe to make brush hangers. Standard electrical conduit is ideal for the purpose.
Slip the loops of the brushes over the pipe and secure each end either with a grub screw or a cable tie.
How to align Black Knight filter brushes
When you have fixed the brushes to the hangers, the other ends need to be fixed as well otherwise they will hang in a disorderly fashion.
Cut a piece of plastic about 1/8 inch (0.3cm) thick and cut it into a strip 3/4 inch (1.5cm) wide and 1 inch (2.5cm) shorter than the brush hanger. Drill holes at the same intervals as in the brush hanger; these should be just large enough to pass the wire through. Remove the knobs, pass the ends through and then replace the knobs.
These strips will hold the brushes in line and ensure that they are always held at the correct spacing.
How to fix Black Knight filter brushes to the chamber
The ends of the brush hangers can be secured using ordinary pipe clips. These can be fixed to the side of the chamber with two screws per clip. The hangers can be pulled in and out as necessary.
When using a tank of flimsy construction, it is necessary to put the clips on top of the edge of the tank and leave a little extra length on the brush hangers. This will allow for the amount the tank bows when it is filled with water.
simon hall (verified owner) –
As described