This is the description in a nutshell of what is actually happening to make this unusual color change.  It even is more prominent during certain times of the year:

The lake is not always pink in color but the distinctive color of the water changes as a result of green alga Dunaliella salina, halobacterium Halobacteria cutirubrum, and/or high concentration of brine prawn. Once the lake water reaches a salinity level greater than that of sea water, the temperature is high enough and adequate light conditions are provided; the alga begins to accumulate the red pigment beta carotene. The pinkhalobacteria grow in the salt crust at the bottom of the lake and the color of the lake is a result of the balance between, D. salina and H. cutirubrum.

The guy in the video seems pretty confident wading in this unusual lake.  What do you think?  Would you dunk your tow or just pleasantly observe from afar?