Planted Tank Guru
Join Date: Mar 2014
Location: Ontario, Canada
nutrafin kh and GH test kit. how to use properly?!?!!
I never used this before. I want to test for kh. I am supposed to add one drop at a time and watch for the color to go from blue to yellow.
Where I fail to understand is, do they mean the slightest sign of yellow tint? Or do I need to match the yellow on the back as close at possible??
If you know please help.me test so I can have an accurate measurement. Thanks