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?
yes. the chlorine and other chemicals will speed corrosion and may even damage PVC tubing or the pump.
however - if you wanted to heat a pool you would use a heat exchanger with two loops - one being recirculating pool water and the other being hot coolant from the miner(s)