You read the strips from the bottom up.
Bottom color is PH
Next above is KH and GH
"Water hardness is a measure of the dissolved mineral content of water. There are two types: the general hardness (GH) and carbonate hardness (KH)."
And then Nitrite and Nitrate.
In new tanks Ammonia is typically the fish killer.
You need to test for Chlorine as well
There are videos of how to use them.
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