My first thought was that something Willy and I did the other night didn't hold, or we knocked some fitting loose in the project. I checked all of the fittings and it didn't appear anything was leaking from them, or anything near them.
Then I noticed that the construction paper I had wrapped around the calcium reactor was soaked completely through.
I'm not quite sure yet where the leak occurred, but it appears that water feeding into the reactor had no way of going through the reactor and into the sump, rather it either leaked at a fitting or out the top of the reactor. The reactor was being fed off a line in the closed loop and as this water leaked out onto the floor, it drained the sump. (70 - 80 gallons) The chiller loop is fed from the sump and with no water, the temperature climbed to 82 degrees in the tank.