Salifert Alk Test Reagent

[SDguy]

of course your mole ratio was off. yes that can happen to anyone mixing acid. I drop it on my colths all the time wife hates it.

I don't think it was so much my calculations, as it was not including the complexities of what happens as acid is added to buffered water. Randy explains it quite well here:
http://www.advancedaquarist.com/2002/2/chemistry

Check out the section titled Step by Step Acidification

[cfamaya]

Excuse my dumb question but what is indicator reagent?
did the older kit have two agents? all I have in mine is the reddish agent & a clear test solution.

Thanks

Carlos

[SDguy]

Yes, the older kits came with an indicator reagent, and a tirtation reagent (but no "test solution" aka standard).