GH testing

McTackett

Member
Mar 12, 2013
58
0
6
Gladstone
Hello everyone,
I wanted to ask about testing GH in your tanks. I have one tank that I can't seem to get a reading on. Would this indicate very low minerals?
I can't seem to get the test to turn green. The KH tested at 5 drops and said was 89.5ppm.
Can anyone offer some pointers here?

I tested the tap water and it was about 6 drops about 107.4ppm for GH.
Thanks everyone