[rdnicolas]

Originally Posted by Myka

I am also skeptical that it was oxygen that caused it, which is why I asked about the magnesium. I'm wondering if you caused a big change in magnesium when you did the 30% waterchange which then may have been the culprit...?

You did say that you just changed salt. Is this the first waterchange you've used it on? Maybe it's a dud pail...

Yep I switched from Instant Ocean to Red Sea Salt. This is my second time using the salt. I did a 30% water change with the new salt before the Magnesium treatment. I didn't realize that the salt can be bad. I did exactly what I did the other times I've replaced the water. before the Magnesium treatment I was doing 30% water changes every two weeks.
If its not the oxygen levles, then I'm completely stumped, aside from the salt and the skimmer not powering up right there really isn't much different that I normally do.