1. TUBEdek increases the capacity of a clarifier, improves the resultant effluent and increases the stability of the process in the event of surges of other process upsets.2. TUBEdek increases the effective areaof a basin (by 5.5m2/m2 for a 500mmdeep module) and decreases the effective particle settling distance drastically.3. TUBEdek enhances the particle agglomeration and growth, bringing the particles into closer contact with each other at the bottom of the tube. This is aided by the v-shape of the tubes and the counter-current flow of the incoming effluent and receding solids.