What can influence a tank's Mg reading

[Myka]

Originally Posted by StirCrazy

why are you increasing Ca if you are getting a NSW level of 380?

Steve

Sorry, I bolded my mistake. When I test IO it's usually 360-370. I just looked at my recordings. My quote was wrong.

Where do you get that number from? Randy Holmes Farley always writes that NSW around the world averages 410 ppm.

It is known that calcium levels of 360 and under start to inhibit growth of stony corals. I don't have a calcium reactor, so I rely on dosing. It is easy for my tank to drop 20 ppm calcium between dosing (mostly because my tank sitter isn't very good at dosing often enough, which is annoying, but at least she does it), so it's too risky for me to be at 380 ppm. I dose my tank to be 415-425 ppm, but as long as it's at or over 400 I'm happy.

[Delphinus]

WOW, Mg at 1100(ish)... LOL. It's so nice and high! I'd only need to add a LITTLE Mg as opposed to .. the entire $#@$#@! bottle!