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Flow
The light, lofty, and resilient composite of thermally fused wood and man-made fibers creates air space and cavities to
facilitate flow. Water passes through the engineered matrix, allowing soil particles to become trapped throughout the
three-dimensional tube profile. Flow is critical to the filtration process. Without sufficient flow, failure may result
from the product being undermined or sediment washing over the top of the filtration system.
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Filtration
Thermally Refined™ wood utilizes intense heat and pressure to create fine fibers designed to maximize surface area
and water retention. These, combined with crimped, man-made fibers, generate far greater surface area than the agricultural
or horticultural by-products in common fiber rolls. Greater surface area results in greater filtration. The engineered
fiber composite is the reason that Terra-Tubes trap more sediment than the closeset competitor - even without the inclusion
of flocculating polymers.
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Flocculation
Impregnated flocculants are slowly dissolved and released by the kinetic energy of water flowing through the tubes.
The flow through process provides a superior polymer delivery system to treat sediment-laden water. The flocculants
react with suspended soil particles initiating coagulation and aggregation. The tube's matrix entrains the majority of
these coagulated particles, while settling or complementary erosion control devices will aid in the removal of
remaining particles.
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