Black Knight Filter Brushes 59'' Simply insert a vortex brush in the path of the flowing water and you will be amazed at how much waste is collected in a short time. If your second and subsequent chambers are already full of media then you can use either one vortex brush strategically placed around the transfer port or you can use several to build up a barrier of them above the inlet of the vortex and below the outlet (assuming that your vortex is designed in this way). This will allow the heavy waste to drop to the bottom of the chamber and then all the waste that does not settle is forced to pass through the brushes thus allowing it to be caught. You can coil one or two vortex brushes around the outlet so that the water has to pass through the brushes. You can create a complete barrier filling the whole cross section of the chamber. With the more brushes you use, the greater the amount of waste that can be collected and also the larger the surface area for biological filtration Vortex brushes can be used in as many chambers as you wish. It is a good idea to leave some room in the first chamber to allow for settlement but subsequent chambers can be filled with vortex or filter brushes as shown. ? Length is 59 inches ? 4 inch Diameter ? Plastic Hang Loop ? Best Quality Brush - Will Not Wear Out We sell many aquatic products online, check out our store!! Terms and Conditions. We use all approved methods for accepting payment. Sales Tax will be added to all shipments based regulations. We always try to combine purchases, please contact us directly for a personal service. You will be notified on the day that your goods have been dispatched via e-mail with tracking which is used on all purchases. Please note that if there are any problems, contact us first via e-mail giving full details of any problem along with your user ID. We use USPS and UPS as our chosen carriers shipments to Hawaii, Alaska Puerto Rico may incur surcharges, contact will be made to advise before shipment at which point the order can be cancelled if desired. Orders placed on Saturday/Sunday Public Holidays will be processed next working day. We pride ourselves on excellent feedback, if any part of the buying experience is not to your satisfaction, please contact us to rectify before leaving feedback. By committing to buy you are agreeing to the Terms Conditions stated above.