THANK YOU CHERYL !!! for such nice words. But it is still FAR AWAY !!! of being amazing. I am still fighting the excess nutrient crash. But I have to accept that the tank is in a positive trend. All growing, slowly, but growing healthy. I am very happy.
Your tank looks great too !!!
Now to the Mg.
These are values I posted last weekend in my thread with a lot of new pictures. The values are now 2 weeks old, but they provide you an example. As I said, the only one I measure more than one time during the week, is the Alk and adjust the pumps accordingly (increasing 1-2 ml the dosing). I did not hav any need to change the dosing volume in the last 2 weeks. At ~ 8-9 PM the value has been ~ 6.5 dkh.
OK... here we go: (2 weeks old values)
Measured at 6 PM. Dosing pumps (alk/Ca) stop at 5 PM
Alk 6.88 dkh Salifert
Ca 425 ppm. Salifert
Phosp. 0.05 ppm Hanna
Nitrate. 0 ppm Red Sea
Mag. 1480 ppm. Red Sea
Salinity. 1025
In your situation, PLEASE !! do not change anything. Stability is the most important thing for these SPS, of course together with good water quality.
Based on your posted parameters, I do not see anything that needs to be changed. If you need to supplement Mg to keep your ~ 1350 ppm continue doing it. Remember that your tank is different than mine and that there aren't 2 equal tanks. Take a look every day to your SPS and if they are happy.....continue as you are.
Mine was just a question (more a curiosity) , not a suggestion that you need to change what you are doing.
Your question was :
With what dose of Mg I start to dose ? (correct ?)
If I were you, I will be measuring Mg today and wait 2-3 days to measure again and if there is no big change, measure again after a week. Like you did, to know your Alk use and start to dose B-Ionic. Well, now you need to know your Mg depletion in XX Days.
When you have that data you add accordingly. Let say you need to add 10 ml/week, then I will divide it in 5 days of 2 ml.
Sorry if this was too basic, but I hope this helps !!!
Cheers
Daniel
PS: I measured Mg 2 weeks ago because a Reef Central member asked me the same question as you after I posted "I do not have any idea what my Mg levels are". I can't remember when it was the last time I measured Mg (many months ago for sure
)