This thread has put me in the mood to take a 2013 Mg reading :)

I don't have a doser, but dose manually as required by hand. Works well for me.

Hi,

I test my mag weekly with a Salifert kit. I have noticed that sometimes there is huge demand and other times nothing. This is when using the same salt mix.

General rule of thumb is 1300 - 1350 or 3 times Calcium, whichever is higher.

I prefer to go heavy on the Mag chloride(550grams per 10litres) and light on the sulfate(80 grams per 10 litres) as there is less ionic imbalance produced. The Chloride combines with Sodium from the Sodium bicarb to form Sodium chloride(salt). Regular water changes take care of the build up of salt. Just google Balling Lite method for more info.

Cheers,
Tim

info on salt
 

This thread might be interesting to some here...
http://www.reefcentral.com/forums/sh....php?t=1714505

Its a bit old, but gives analysis of the various salt mixes
And yes, the salt mixture you switched to is somewhat low in mag
Not sure if its the only problem