High Magnesium

[Christine Rawlings]

Todays parameters (32 g with sump) are:

Temp: 77
Salinity: 1.026
PH: 8.6 (last checked it was 8.2)
Nitrate: 13.6
Phosphate: .07
Calcium: 409
Alk: 8.4
Magnesium: 1640 (last checked was at 1560)

Any ideas why my magnesium is so high? Before the beggining of August my Mag was normal. I have not dosed any magnesium either.

Not sure about the PH increase but I know that could be many things)?

 

[Solo McReefer]

Using Reef Crystals?

 

[gbroadbridge]

Todays parameters (32 g with sump) are:

Temp: 77
Salinity: 1.026
PH: 8.6 (last checked it was 8.2)
Nitrate: 13.6
Phosphate: .07
Calcium: 409
Alk: 8.4
Magnesium: 1640 (last checked was at 1560)

Any ideas why my magnesium is so high? Before the beggining of August my Mag was normal. I have not dosed any magnesium either.

Not sure about the PH increase but I know that could be many things)?

Most likely test error.

Which test kit. Has it expired.

Testing some freshly mixed salt water will determine if the kit is faulty

 

[Solo McReefer]

Testing some freshly mixed salt water will determine if the kit is faulty

Or that the salt mix Mg is hot

I have always got high Mg with Reef Crystals. Salifert and Hanna

 

[Christine Rawlings]

Most likely test error.

Which test kit. Has it expired.

Testing some freshly mixed salt water will determine if the kit is faulty

I switched to the Hanna checker from the Red Sea test kit. It would make sense since it may have been around that time. It is brand new though so not expired. So I’m using the same test kit on my other newer 15 gal tank and the test reads 1510, would you say both are wrong then?

 

[Christine Rawlings]

I switched to the Hanna checker from the Red Sea test kit. It would make sense since it may have been around that time. It is brand new though so not expired. So I’m using the same test kit on my other newer 15 gal tank and the test reads 1510, would you say both are wrong then?

 

[Christine Rawlings]

Most likely test error.

Which test kit. Has it expired.

Testing some freshly mixed salt water will determine if the kit is faulty

So I just tested with my old test kit from Red Sea and you were right, it came out to 1370. Big difference. I am wondering if it is me doing the test wrong but I am following the directions. I guess I’ll do some research on this Hannah tester. Thanks!

 

[Christine Rawlings]

Most likely test error.

Which test kit. Has it expired.

Testing some freshly mixed salt water will determine if the kit is faulty

So I just tested with my old test kit from Red Sea and you were right, it came out to 1370. Big difference. I am wondering if it is me doing the test wrong but I am following the directions. I guess I’ll do some research on this Hannah tester. Thanks!

 

[gbroadbridge]

So I just tested with my old test kit from Red Sea and you were right, it came out to 1370. Big difference. I am wondering if it is me doing the test wrong but I am following the directions. I guess I’ll do some research on this Hannah tester. Thanks!

The Hanna Magnesium checker doesn't have a particularly good reputation and often reads very high.

FWIW, if you are doing regular water changes you probably do not need to test magnesium at all.

A discussion is here:

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

 

[Christine Rawlings]

The Hanna Magnesium checker doesn't have a particularly good reputation and often reads very high.

FWIW, if you are doing regular water changes you probably do not need to test magnesium at all.

A discussion is here:

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

Thank you!