Yes. 100% the reason for the crash. As soon as I discovered the salinity issue I was able to correct the problem. It took about 6 days to get it to the right levels. In the process I added some fritz turbo start to replenish some of the bacteria that was killed off from running the dead sea in my tank. I lost 90% of my coral and livestock. It was very devastating. But I have everything set back up and I'm slowly adding new coral. It's bouncing back. I'm no longer using the digital stuff and sticking to the refractometer.