It was not grains of salt, Ive seen a lot of different afflictions from back when I didnt know much and even dealt with some parasites I couldnt identify when I was keeping local fish I caught a few years back by using a dip. The fish dont react well to dips Ive learned, but its better than dead. Anyway, this took the fish in a couple days, Ive done nothing but water changes and feed them for the past year or so. The fish were large goldfish, a black moor, a fancy, and a regular ol goldfish that was originally a feeder but wouldnt get eaten. The spots were large, encompasing perhaps 2 square inches of the fish in places. It wasnt fluffy, cotton-like, etc. just flat leisions. The fish were fine one day, I was gone the next, the day after I noticed them and was going to head to the store to get something to help with it and did a water change and added salt since I could do nothing else and it was late. The next day they were dead. This stuff even covered the black moors eyes and back across the gill covers. The fins looked eaten, I just dont understand the rate at which the fish died. Like i said, I got a "fix all" broad spectrum drug and overdosed the tank and will tomorow too, as there are no fish to harm, changed some water, cleaned equipment, put a heater in the tank and have it heated to about 90, and Im stumped. Dont know how long I should wait. Even the driftwood seems to have some white spots on it, leading me to think it may be a fungus or something similar. Bottom line is I dunno.