Occasionally, we had water scarcity in secondary school, and had to walk long distances to fetch from muddy wells.
A flocculant (Alum) always came in handy for clarification, but you do not just drop it in a bucket and expect clarification. You literally stir up the waters to allow centrifugal and centripetal forces to act. In fact, if you did not even have alum, or did not like the feel of water after alum addition, just stirring up the waters in a whirling cycle led to clarification.
As a brewer, I found that same thinking in the last clarification step of brewing. No alum required, but a stirring up of the waters (or in this case, the stirring up of wort) improved clarity.
Just as literally stirring up the waters helps bring clarity, metaphorically doing same helps.
– Osasu Oviawe