Hi
I have been thinking of using dry chemicals to dose my reef tanks for Alk, Ca and Mg. And I have been reading on the subject. Randy Holmes Farley's articles have a lot of information. However I am unable to understand how the PPM concentration of supplements as is mentioned in the articles is being calculated by him.
The article I refer to is - http://reefkeeping.com/issues/2006-02/rhf/index.php
In the article, under Recipe 1, Part 1: The calcium part, 500gm of Calcium Chloride Dihydrate is used. Using the atomic weights of Ca and the other elements, a 1M solution of 147 gm of the dry chemical would give approximately 40,000 ppm. 500gm of the chemical would mean roughly 136,000 ppm. However the article mentions that the solution created using the recipe has only 37,000ppm.
Similarly,Receipe 1, Part 3B, calculates Mg and Sulphates at 47,000 and 187,000 ppm, whereas using the calculations mentioned above I get much higher values.
I maybe incorrect or using a wrong formula.
Is there any article that explains clearly how the ppm can be calculated for a particular element using an amount of dry chemical and water. If any one knows the method Randy has used please do share. Or if Randy reads through this post, then his response will be much appreciated.
I have been thinking of using dry chemicals to dose my reef tanks for Alk, Ca and Mg. And I have been reading on the subject. Randy Holmes Farley's articles have a lot of information. However I am unable to understand how the PPM concentration of supplements as is mentioned in the articles is being calculated by him.
The article I refer to is - http://reefkeeping.com/issues/2006-02/rhf/index.php
In the article, under Recipe 1, Part 1: The calcium part, 500gm of Calcium Chloride Dihydrate is used. Using the atomic weights of Ca and the other elements, a 1M solution of 147 gm of the dry chemical would give approximately 40,000 ppm. 500gm of the chemical would mean roughly 136,000 ppm. However the article mentions that the solution created using the recipe has only 37,000ppm.
Similarly,Receipe 1, Part 3B, calculates Mg and Sulphates at 47,000 and 187,000 ppm, whereas using the calculations mentioned above I get much higher values.
I maybe incorrect or using a wrong formula.
Is there any article that explains clearly how the ppm can be calculated for a particular element using an amount of dry chemical and water. If any one knows the method Randy has used please do share. Or if Randy reads through this post, then his response will be much appreciated.