Calcium Hardness

[benmccurdy]

Even if we did trust them, they don't report actual test values. THey just say CYA between 100-150 perhaps...we need an exact number to work off of.

 

[benmccurdy]

I just bought the FAS-DPD from Amazon. So I guess I shouldn’t use my main kit anymore to test FC right?

 

[mknauss]

So I guess I shouldn’t use my main kit anymore to test FC right?

Correct. The TC test you have is OK to use if you get a strange FC result from the FAS-DPD (like a 0 and you are sure there is chlorine in the water). It is just a check that, yup, there is chlorine in that water.