The KH changed color with one drop. The problem is that the GH does not change even after 40 drops. What is going on with the test and what can I do to fix it?
i think it depends on your water parameters. kh only measures carbonate hardness, whereas gh is your general hardness. usually gh is higher. the other thing that i noticed was also that it's a lot harder (at least for me) to see the endpoint of the gh test relative to the kh test.
is there a reason you think those readings might be off?
griffin, Well when I did the GH I put 40 drops in the test tube and there was NO color change.
I gave up adding drops after 40 with no change. The KH changed color with 1 drop.
I dont know what to do. The chart stops at 12 drops.
hmm - we might have different tests. i also have the api brand, but there's no chart. each drop is one kh or gh unit.
are your readings consistent? (is the tank consistently hard water?) if so, i wouldn't really worry about it. fish will adapt to most any water conditions
