Reef Salt turning blue

[ndz98]

I’ve had this bag of salt for probably a couple years now and I’ve noticed that it now has a blue tint to it. I’ve also noticed it takes more salt to get to the correct salinity and there’s always a little salt left at the bottom. I use a power head and heater to mix it up. Is it normal for salt to have these problems? Do I just need to toss it and get fresh salt?

 

[Big G]

Bump

 

[Randy Holmes-Farley Verified Community Expert]

I wouldn’t use salt that was turning blue. It sounds like copper contamination is a distinct possibility. It might be ok as color is not a good gauge, but not many things will turn it blue.