Hey Guys,
what solution did you choose for the use of Hydro Miner? It's all about cooling the liquid, do you use radiators with air conditioning? If so, is it all in one room or do you take the warm air outside?
Maybe if you have a large body of water or something you could set up system to transfer the heat via conduction. That should cool down the system much faster than with radiators. The bonus is you get a heated pool/jacuzzi/barrel/whatever.
The same principle of heat transfer should work for any large enough body of water relative to your rig size. Not that I have any practical experience in hydro mining.