Good idea, and I've used flocculants in water-treatment before, but...
You can achieve virtually the same effect by chilling the brew, which will cause the floc to settle, with clear liquid above. But I think the general consensus is that such brews tend to be weaker, if more palatable...
Egg-white tek achieves similar results too.
But I can't see many people wanting to add aluminium salts to their brew... Done carefully, most should settle out as precipitate, but still...Your brain's on fire, and you're swooshing aluminium ions around it, potentially?!
Having said that, across much of the Amazon basin, the river-water is naturally high in dissolved aluminium, so...?
Personally, I think chemical flocculation is best reserved for simple clarification of dirty liquids in bulk.
And sometimes less tek is best tek
“I sometimes marvel at how far I’ve come - blissful, even, in the knowledge that I am slowly becoming a well-evolved human being - only to have the illusion shattered by an episode of bad behaviour that contradicts the new and reinforces the old. At these junctures of self-reflection, I ask the question: “are all my years of hard work unraveling before my eyes, or am I just having an episode?” For the sake of personal growth and the pursuit of equanimity, I choose the latter and accept that, on this journey of evolution, I may not encounter just one bad day, but a group of many.”
― B.G. Bowers
ॐ