Dosing Magnesium

[sumpreef]

I have a question about magnesium dozing. When I test my magnesium using the upper magnesium kit, my values are anywhere between 1150 to 1300. Currently, I’m doing the BRS two stage along with magnesium as as well as part C with trace element. My calcium levels are all very stable when I check weekly. However, , my magnesium seems to fluctuate quite a bit. Unsure of how to correctly dose magnesium. Currently set to dose approximately 8 cc of magnesium for a 50 gallon tank, which should only really increase it by 2 ppm if my math is correct? However, the part c is the unknown variable, and I’m not sure how much that increases the magnesium by.

 

[Fish Fan]

Honestly, Randy advises not testing magnesium at all, because home hobby-level test kits for Mag are most often flaky at best. You can follow Randy's thread here on dosing Mag based your comsumption of calcium, and not by directly testing Mag:

Just say NO to magnesium testing: RMM is born

OK, this thread has been many years in the making, and I'm posting it here since folks in the chem forum are probably already tired of all the threads relating to problematic magnesium testing. I'm going to propose a method, let's call it the Randy Magnesium Method, or RMM for short. All good...

www.reef2reef.com

Good luck!

 

[sumpreef]

Thank you very much for the link. However, how much of parts C factors into the overall magnesium dose? Ie how much mag is in part c

 

[sumpreef]

Thank you very much for the link. However, how much of parts C factors into the overall magnesium dose? Ie how much mag is in part c so I can dose the appropriate 5-10%

 

[dwest]

Thank you very much for the link. However, how much of parts C factors into the overall magnesium dose? Ie how much mag is in part c so I can dose the appropriate 5-10%

I would ask that question on Randy’s RMM thread.

 

[sgdnycct]

Following

 

[Randy Holmes-Farley]

Part C does not offset ANY magnesium consumption. It merely offsets the drop in magnesium from salinity corrections necessary with a two part.

When using RMM and determining how much mag to dose based on calcium dosed, one should ignore magnesium contributions from Part C.

 

[Shinji Ayanami]

Honestly, Randy advises not testing magnesium at all, because home hobby-level test kits for Mag are most often flaky at best. You can follow Randy's thread here on dosing Mag based your comsumption of calcium, and not by directly testing Mag:

Just say NO to magnesium testing: RMM is born

OK, this thread has been many years in the making, and I'm posting it here since folks in the chem forum are probably already tired of all the threads relating to problematic magnesium testing. I'm going to propose a method, let's call it the Randy Magnesium Method, or RMM for short. All good...

www.reef2reef.com

Good luck!

also isn't mag like secondary for coral. unless youre running some sort of highend finely tuned ferrari of a tank i dont bother with mag.

also are you saying the hanna mag checker is iffy as well

 

[Fish Fan]

also isn't mag like secondary for coral. unless youre running some sort of highend finely tuned ferrari of a tank i dont bother with mag.

also are you saying the hanna mag checker is iffy as well

If you're doing water changes, often that's enough to replace Mag for most corals.

The Hanna may be one of the best tools available to hobby reefers, but it still has a margin of error, and I think it can be easier to handle Mag as Randy describes in his article linked above.