Hi. Im curious about bitcoin and how it works. If a person sends around 1 BTC in a tumbler, is it easy to track the transaction? I mean, how much people do not send around just 1 BTC every hour. Is it easy to track smaller transactions? Or easier to track larger transactions? Lets say that 10,000 people send around around 1 BTC per hour. How would these trace tools know which BTC transaction belongs to who?

Looking for a great bitcoin mixer because bitmixer.io has closed.
I heard that they had very strong mixing algorithm. What mix algorithm did they use? Is there any service that uses the same or even stronger mixing algorithm?
Any service that uses the same security?