Measuring calcium , the best way?

[Ryan Rioux]

Hello all! I’m wondering what the best way of measuring calcium is in a reef aquarium . I have Hanna checkers , calcium and alkalinity . I’m wondering how accurate they really are . I just used mine for the first time today and I got a reading on 528 ppm ca, and alkalinity was 148 ppm. I tried Red Sea rest and api test and both came close to 500 ppm for calcium. I did do a water change last Sunday morning and don’t have many corals . I’m just starting to get into the coral thing now . Always have done just fish but I want to be sure when I dose I am dosing properly .

Only corals I have are
A candy cane
Frogspawn
Small batch of zoas
And some lime green polyps.
( most came on one piece of live rock I bought )

Also they don’t make a magnesium checker from Hannah?

 

[Ocelaris]

Are you doing the procedures right? The alkalinity measurement doesn't even make sense as the Hanna alkalinity meter reads in dkh. I don't have the Hanna calcium, but that sounds a but off. Are you dosing anything? The brs site has good how to videos, but if Hanna has a video, I would watch that. The test kits can be very finicky and it doesn't take much to skew the results.

 

[Undertaker]

Hello all! I’m wondering what the best way of measuring calcium is in a reef aquarium . I have Hanna checkers , calcium and alkalinity . I’m wondering how accurate they really are . I just used mine for the first time today and I got a reading on 528 ppm ca, and alkalinity was 148 ppm. I tried Red Sea rest and api test and both came close to 500 ppm for calcium. I did do a water change last Sunday morning and don’t have many corals . I’m just starting to get into the coral thing now . Always have done just fish but I want to be sure when I dose I am dosing properly .

Only corals I have are
A candy cane
Frogspawn
Small batch of zoas
And some lime green polyps.
( most came on one piece of live rock I bought )

Also they don’t make a magnesium checker from Hannah?

that would make it around 8.3 DKH the formula to get that is PPM / 50 * 2.8 = dKH

 

[DHill6]

Hello all! I’m wondering what the best way of measuring calcium is in a reef aquarium . I have Hanna checkers , calcium and alkalinity . I’m wondering how accurate they really are . I just used mine for the first time today and I got a reading on 528 ppm ca, and alkalinity was 148 ppm. I tried Red Sea rest and api test and both came close to 500 ppm for calcium. I did do a water change last Sunday morning and don’t have many corals . I’m just starting to get into the coral thing now . Always have done just fish but I want to be sure when I dose I am dosing properly .

Only corals I have are
A candy cane
Frogspawn
Small batch of zoas
And some lime green polyps.
( most came on one piece of live rock I bought )

Also they don’t make a magnesium checker from Hannah?

The older Hanna meter you have to multiply the reading by .056