I don't tend to agree that it takes any time to "mix" once it is clear.
Just my experience that 48 hours is what it takes to mix and clear in my 30 gallon tub with a powerhead and heater. Sensitive corals slime up or otherwise react negatively orherwise when i did otherwise.
I leave it for a week usually, now. I'm no chemist, and have killed enough corals to be cautious about such things.
In other words, it certainly does not hurt to allow 48 hours or longer, and im cautiousand patient on all coral related things--or at least strive to be! Lol.
BRS video show it's not mixed, i.e., clear, in 24 hours, at least for their set up. That was enough confirmation for me to wait longer...