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PERMA-BEAD
INFORMATION
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PHYSICAL
SHAPE - Perma-Beads are specifically designed to replace sand in rapid sand filters.
Perma-Beads do not have any flat or porous surfaces that can stick together as in
sand or other angular or porous media. The smooth ellipsoid shape and central bulge of
each bead prevents adhesion and bridging to other beads. This unique egg shape also
creates large interstitial spaces between Perma-Beads trapping large quantities of
debris thereby extending the time between backwashes while minimizing water use.
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SURFACE
PROPERTIES - The very hard surface properties of Perma-Beads prevent
bacteria from etching into the surface and the very slippery surface allows even the
stickiest waste to be scrubbed off when the bed fluidizes upon backwash. In fact, as
Perma-Beads age, they remove smaller particles as a thin of nitrifying bacteria
covers each bead. These are the same bacteria that creates bridging, clogging and
channeling in other media, but in Perma-Beads, this mechanism actually serves to
trap smaller particles that are then easily removed in the backwash cycle.
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WATER
QUALITY -Since 1989, Perma-Beads™ have been used in thousands of filters, all are
still consistently providing exceptionally clear water.
The 4,520 square feet
of surface area per cubic foot provide a significant surface area for supplemental
biological filtration, especially when an oxygenated flow of water enters the filter
canister, such as when an AQUACUBE is place near the suction intake in the pond.
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Advanced
Aquaculture Systems, Inc.
4509 Hickory Creek Lane
Brandon, FL 33511
Toll
Free: (800) 994-7599
Phone: (813) 653-2823
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Fax: (813) 684-7773
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