Anyone can translate from meq/l to ppm?

[NanoCube-boy]

Hi, I recent test my ammonia and it's in Meq/L. How can I translate that too ppm? Is the a reference guid to change meq/l to ppm?

btw, my ammonia reading doesn't match any color guide on Salifert test. It's murky clear, not light yellow murky like 0.25meq/l. Does that mean undetected?

 

[Bri Guy]

1 meq/l = 1 ppm

can't get easier than that

 

[NanoCube-boy]

oh... Cool thanks a lot man.... Good info.

 

[Percula9]

2.8dkh= 1meq/L
1dkh=17.9ppm


For example:

10dkh= 3.57meq/L

10dkh= 179ppm

1meq/L= 50.12ppm not 1ppm

1mg/L= 1ppm

 

[NanoCube-boy]

How did you know this source from?

 

[Randy Holmes-Farley]

I discuss all such issues for reefers here:

The Units of Measure of Reefkeeping
http://reefkeeping.com/issues/2005-08/rhf/index.php

 

[Boomer]

........and here is a calculator for it


Carbonate Hardness Calculator
http://www.aquaticcommunity.com/converter/hardness-calculator.php

 

[NanoCube-boy]

Randy, I'm sorry, but still lost how to convert from meq/L to ppm. That article still a blurry vision to me.

 

[swearint]

From Randy's article:

The units of alkalinity can be meq/L (milliequivalents per liter), dKH (degrees of carbonate hardness) or ppm (meaning ppm of calcium carbonate equivalents). 1 meq/L = 2.8 dKH = 50 ppm CaCO3 equivalents.

So just multiply your reading that is in meq/L by 50 to get ppm.

Todd

 

[Randy Holmes-Farley]

:thumbsup:

FWIW, that conversion only applies to alkalinity. Others types of things might also be expressed in both ppm and meq/L, but will have a different conversion relationship. ppm is a measure of weight, while meq (milliequivalents) is a measure of the number of the ion in question.

 

[swearint]

Doh, I did not go back and read the original post. I assumed he was dealing with alk.

Todd

 

[Randy Holmes-Farley]

Actually, so did I.

Ammonia is almost never reported in meq/L. That is probably a typo and should be something else (mg/L, probably). 0.25 meq/L of ammonia is quite a lot, about 3.5 ppm ammonia-N.

 

[NanoCube-boy]

oh. I see.

 

[Randy Holmes-Farley]

So things are under control now?

 

[Bri Guy]

sorry for adding confusion, I miss read it as 1mg/L to ppm, not meq/l to ppm.