Calcium and Mag high

[cdnco2004]

I just replaced my API test kit with Hanna checkers. My calcium and magnesium are both high. I used Reef Crystals for my salt. Looking to change to Tropic Marine on my next salt purchase.

Here are my numbers

Calcium: 495
Magnesium: 1730
Alkalinity dKH: 11.2
Nitrate HR: 11.9
Phosphate ULR: 0.16

Tank is about 4 months old. Just got a couple of coral this week. 4 Octospawn heads and some Yuma and Zoa. 2 Clowns, 1 Coral Beauty, 6 Blue Green Chromies, a cleaner shrimp and misc snail/crab cleanup.

I was watching the BRSTV video about Calcium and Magnesium, and I think h said Calcium is toxic above 500 so I am a bit worried.

 

[Randy Holmes-Farley Verified Community Expert]

I was watching the BRSTV video about Calcium and Magnesium, and I think h said Calcium is toxic above 500 so I am a bit worried.

I hope they didn’t say that. It’s so very obviously untrue. if they did say it, it’s another reason to not get information from them. Some salt mixes start above 500 ppm.

Your calcium is fine. Even 550 ppm is fine.

 

[Randy Holmes-Farley Verified Community Expert]

The magnesium is quite high, but it may just be test error or high salinity.

what do you think the salinity is and how did you measure it?

 

[cdnco2004]

Whoops forgot Salinity and PH. I have a digital tester for PH and SG.

 

[cdnco2004]

This was the BRS video https://www.bulkreefsupply.com/content/post/master-reef-tank-chemistry-calcium-magnesium at 2:25 he states they think acute toxicity is above 500.

 

[Randy Holmes-Farley Verified Community Expert]

To clarify what they claimed, they said toxicity is likely above 500 ppm. What they presumably meant is that toxicity kicks in likely somewhere above 500 ppm, like 10,000 ppm is above 500, not that they were claiming that 501 ppm is toxic (it isn’t).

It was a poor choice of words, but I’m sure they did not mean to imply that 501 ppm is known to be toxic.

 

[Dfrashid]

I hope they didn’t say that. It’s so very obviously untrue. if they did say it, it’s another reason to not get information from them. Some salt mixes start above 500 ppm.

Your calcium is fine. Even 550 ppm is fine.

Thank you just just answered my next scare

 

[Dfrashid]

Whoops forgot Salinity and PH. I have a digital tester for PH and SG.

What kind of tester is this I want one lol

 

[cdnco2004]

What kind of tester is this I want one lol

RCYAGO Smart Bluetooth PH Meter PH Tester with ATC, 7-in-1 PH/TDS/EC/ORP/S.G/Salinity/Temp Meter, 0.01 Resolution High Accuracy Water Quality Tester https://a.co/d/0BHJjQR

Or Amazon search ble-c600