Instant Ocean Reef Crystals crashed my Tank!

[ponokareefer]

This is really strange that a 10% water change would cause a whole system to crash immediately. To me, it seems like there was a toxin introduced that caused this to happen. As others have pointed out, maybe something leaked into the mixing salt container. I would think there would be a lot more people using the salt that would start reporting this issue on this forum and on other reef forums. Maybe that is still to come though.

As for mixing salt and leaving it for extended periods, I mix mine about 10 days in advance and keep powerheads and heater on.