Hardness in PPM

[redilyn]

I have a question. Ive been trying to figure out how the hardness measurments my test gives me can be changed to KH.

My test just measures in PPM of hardness. thats all it tells me plus ppm=mg/l

How do i change this to KH.

My water has 90ppm hardness.

Thanks in advance

 

[Kasakato]

What exactly is hardness. Is it GH?

 

[ergo sum]

1 degree (dKh)equals about 17.8ppm. Here is a calculator.
http://www.saltyzoo.com/SaltyCalcs/AlkConv.php

 

[redilyn]

What exactly is hardness. Is it GH?

umm im not sure. here ill type you what it tells me.

"This kit determine if water is hard or soft in parts per millin (ppm). This kit is provided with three bottle solutions clearly marked, Bottle 1: Sodium Hydroxide, Bottle 2: Calmagite Solution, Bottle 3: EDTA Color indicator. The prpoper dosage of these solutions will provide an accurate level of very soft to very hard water.

water hardness is determined by the number of drops of EDTA color indicator from bottle 3 that must be added to the final step to turn the test water blue. Eash drop equals 10 parts per millin (ppm) of hardness"

It dosnt say anything to help me figure out what im acutally testing bleh.

It is an aquarium pharmaceuticals fresh water master test kit.

 

[Kasakato]

The AP Master Kit includes: pH, high range pH, ammonia, nitrite and nitrate. No hardness. Do you have a link or pic?

 

[redilyn]

The AP Master Kit includes: pH, high range pH, ammonia, nitrite and nitrate. No hardness. Do you have a link or pic?

sorry for the poor quality i dont have a good digicam.


http://pnhclan.kicks-***.net/ICAM0001.jpg

umm i guess it filters bad words. well you can guess that it is. 3 letters

 

[Kasakato]

Wow. Never seen that before. Do you have a picture of the actual tests?

 

[Kasakato]

Nvm. Found it. You tested for KH, Not GH.

 

[daveedka]

KH= alkalinity, buffering, carbonate hardness. Directly correlates to Ph of water 17.9 ppm= 1 degree of Kh or 1 dKH

GH= General hardness, usually tests for Calcium and Magnesium ions in the water. Has no real relationship to PH or to KH.
17.9 ppm Gh= 1 degree of hardness or 1 dGH

Dave

 

[RTR]

The GH and KH tests used here are both expressed or reported as ppm CaCO3, where 17.86 ppm or mg/L = 1 degree of "hardness".

GH measure hardness for soap foam production, but has importance in the hobby for breeding certain fish.

KH is better called alkalinity or buffering capacity and in many native water conditions determines the pH. CO2, organic and inorganic acids will alter the reading of pH and may or may not affect the KH at the same time.