salefert alkalinity test

[bel air]

Has anyone used this kit. kh test is explained, but how is alkalinity test done? They do not explain how in the instructions.

[Steve Wright2]

Alkalinity and KH are different terms for the same thing

KH is measured in degrees - so numbers of 8, 9, 10 or 8.2. 9.6. etc are recorded when testing using a KH test kit

Alkalinity is measured in milligramme equivelents per litre Meq/L
and numbers like 3. 3.2. 3.4 etc are the result of tests using those type of kits

to convert a KH reading into an Alk reading - you just divide the KH result by 2.8
thus if 9.6 was you KH 9.6 divided 2.8 = 3.42 Alk

Steve

[bel air]

Thanks. Just wonder why Salifert has two test bottles in their test kits.

1 for kh
1 for alkalinity

They only explain how to test for kh and no explanation for the alk. test.:blown:

[Steve Wright2]

Sorry
the other bottle is a sample of water/fluid with 7.5 DKH +/_ 0.3

you use this to check your test kit

run a test with that solution and check your test kit reads between 7.2 and 7.8

if it does - then your test kit is accurate ( providing the test solution is )

Steve

[Habib]

What Steve said.

That solution (check solution) allows to run a check. If the deviation is too large, either the kit has gone bad, the check solution has gone bad or it is a user error. Regardless, it allows to notice if something is wrong with the testing.


The actual value of the check solution varies per batch and is printed on the label.

[bel air]

no good e-mail address

[Max123]

Alk is ppm 10,20,30,40,50,60, and so on so you take 9.6 x 17.9 = 171.84 so alk is 170