What happened to my salt?

[GMGQ]

I agree, it's the humidity in the room. Mine used to do that too, the top layer would get almost rock hard. I thought I was sealing the lid tightly too.

But now I use a small hammer to give it a couple of whacks to seal it. No problems since. (of course I need to give it a couple of whacks the other way to open it each time).

BTW, how are you mixing it? I have a powerhead in my change water tub that's on 24/7, so even when I had chunks, they would dissolve within a few hours.

Originally Posted by Delphinus

Exposure to humidity maybe? ... my salt gets like that towards the end of the bucket but usually still dissolves for me if I break it all up. Usually the stuff under the crust is still fine too.