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Originally Posted by lcstorc  Really there is no difference. If your salt is low on Mag then you need to supplement it. I use TM Pro Reef and it is generally low on alk so I supplement that. Different salts have different levels. That is why it is important to test your NSW. I don't test mine every time but I do when I open a new bucket of salt even though I alway buy the same brand. In some cases there is a difference between batches though I have not found that with TM Pro. I test anyway just to be sure. |
I'm not calling you wrong, but I can't help feel that if a salt is low in one area that I can test, I suspect that it's also low in other areas that I can't test.
My thought is that if your salt is low on Magnesium, you need a new brand of salt. Magnesium is a very basic component, and not that expensive, so there is no reason for the salt manufacturer to skimp on it.
Ditto if I found a lot of differences between batches. Time to try a new salt.