Degree of flocculation is mainly related to ability of flocculating agent too form "flocs" in suspension.

Higher the degree of flocculation, better the agent.

Flocculation efficiency increases with increasing electrical charge on the flocculating species. For example, Al+3 > Ca+2, > Na+.

Flocculation is the act of many small particles (particularly in water) being massed together so they can be removed. This is started by adding another liquid to the water.

The limit flocculation is the amount of an antibody (measured in international units) which equilibrates the antigen present such that the antigen-antibody complexes precipitate (flocculate : asexual aggregation of microorganisms.).