Re: BITMAIN‘s Liquid Cooled Miner C1: It is not only cool, but it is cool
Not to spread anti-environmentalism, but an obvious great market for this is people who have unmetered water. 
That's the other side of the C1 - those who use large farm evapourative cooling can simply plumb in the C1 into their mains.
Would swimming pool water corrode the water blocks?
Would probably deposit a load of minerals in the blocks and gunk up everything. Maybe though, interesting.