How to test for GH

[MSU Fan]

I lost my instructions for my GH kit, can someone tell me how to perform the test for GH? TIA!

 

[plecoperson]

For the Aquarium Pharmaceuticals kit:

5 ml tank water in tube

One drop of solution, invert tube several times (water turns orange)

Keep adding (and counting) drops of solution, mixing after each drop.

When test turns green you are done.

Each drop = 1dGH or 17.9 ppm GH

 

[MSU Fan]

thanks!