gone fishin
Aquarium Advice Regular
How do I convert mg/liter to parts per million for adding NO3 ?
converting mg/liter to ppm
- Thread starter gone fishin
- Start date
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Fruitbat
Aquarium Advice Addict
Since 1 Liter of water weighs 1000grams (1,000,000 mg)...if you know the concentration in mg/L then the ppm value is the same.
For example:
If the concentration is 50mg solute/L of water then it is also 50mg solute/1,000,000mg of water or 50 ppm.
To make a long story short....the value is mg/L is exactly the same as the ppm value.
Edited so that it actually says what I meant it to say!
For example:
If the concentration is 50mg solute/L of water then it is also 50mg solute/1,000,000mg of water or 50 ppm.
To make a long story short....the value is mg/L is exactly the same as the ppm value.
Edited so that it actually says what I meant it to say!
krap101
Aquarium Advice Addict
err i think he meant the mg/l is exactly the same as ppm. or i got it wrong 
malkore
Aquarium Advice Addict
mg/l and ppm are the same...no need to convert. Its just that technically its expressing it in two different forms.
shawmutt
Aquarium Advice Addict
LOL fruitbat, I'm a bio major and you lost me there
Fruitbat
Aquarium Advice Addict
Sorry....
1 mL of water has a mass of 1000mg
1 Liter of water is 1000mL
so....1 L of water has a mass of 1,000,000 mg (1000 X 1000)
If you have a concentration of 50mg/L...that is the same as 50mg/1,000,000mg
This is 50mg of solute per 1,000,000 mg of water or 50 parts per million.
1 mL of water has a mass of 1000mg
1 Liter of water is 1000mL
so....1 L of water has a mass of 1,000,000 mg (1000 X 1000)
If you have a concentration of 50mg/L...that is the same as 50mg/1,000,000mg
This is 50mg of solute per 1,000,000 mg of water or 50 parts per million.
madasafish
Aquarium Advice Addict
*Chuckle* It's thanks to the fact that the metric system (mg/L) is more logical, and works with a base 10 system. Thus, mg/L comes out as a ratio of 1/1,000,000. In the SI system (Systeme Internationale d'unites), we couldn't say "ounces per gallon" and still have a nice ratio like 1 to a 1,000,000. So, we have to call it "parts per million" instead.
Just another proof that we really need to convert to the metric system! Come on America, almost the entire world has, and we're dragging our feet.
Just another proof that we really need to convert to the metric system! Come on America, almost the entire world has, and we're dragging our feet.
gone fishin
Aquarium Advice Regular
I bought a Hagan test kit and it barely shows any nitrates. I added 1/2 tsp. potassium nitrate to a 55 gal. it still shows less than 5. I thought the conversion was wrong. Should I add more or is the kit not reading correct?
malkore
Aquarium Advice Addict
my Hagen nitrate kit isn't very reliable. i gave up on using it for the most part.
