What is happening to my magnesium?

[Randy Holmes-Farley]

I never did the math on Mg in AFR, didn’t realize it was low. It’s has 0.475 ppm Mg per 10 ppm Ca. That is quite close RMM is 0.5-1 ppm Mg per 10 ppm Ca.

Yes, that’s about the number I have. Mag is 4.4% of Ca according to Hans-Werner. Close, but lower than RMM. It will be deficient in a coralline driven tank, and plenty/excess in a sps tank.

Where can I find the dosing calculator for Tropic Marin All for Reef (AFR)?

I remember it used to be at the bottom of the tropic marin site but it's no longer there. Does anyone know where I can find it again? My alk is currently 6.7 and I want to raise it to 8.0 (tank volume is 95 gallons). The instructions only say to add 5ml per 25 gallons but I have no idea how...

www.reef2reef.com

 

[Vinstr]

Yes its a little lower but if I m doing regular weekly 15% water changes with Tropic Marin Reef Pro salt which has extra calcium I am hoping that will be enough to keep it steady. I just stopped my daily 50ml Mag dosing and will see what happens. I am not even going to test since I know it will just make me crazy. I am going to rely on your science which seems to make a lot sense. Fingers crossed!

 

[Randy Holmes-Farley]

Yes its a little lower but if I m doing regular weekly 15% water changes with Tropic Marin Reef Pro salt which has extra calcium I am hoping that will be enough to keep it steady. I just stopped my daily 50ml Mag dosing and will see what happens. I am not even going to test since I know it will just make me crazy. I am going to rely on your science which seems to make a lot sense. Fingers crossed!

Sounds good. Happy reefing.