I agree aqua, want to make sure nitrate test being done properly.
ok, so rince the bottle in tank water, not tap water, then fill to level shown, shake test bottle #1 a bit, this one not need a whole of shaking and add the 10 drops to the vile, then test bottle#2 shake the pee out of it, beat on a table what ever. the stuff crystallizes and needs to be broke and dissolved before adding the ten drops to the test water. .