Time to switch out salts....

[Roatan Reef]

IO is not low quality and as far as standards it is very very consistent. That is why so many public aquariums use it. It's a good salt for a good value and I hate to hear it described so harshly. I don't want new hobbyists to get the wrong idea about it. That being said, yes, there is a residue left in my mixing bucket but it is harmless.

100%

 

[rd62rdstr]

I used IO before and had the same brown film develop. Switched to Red Sea blue and parameters have been more consistent, mixes cleaner, and no more brown film. Corals grow much faster now.