Features of an improved water chemistry test kit include, without limitation, a test block, colored liquid reagents, and color comparison displays. At least one ridge, wall, semipermeable barrier, etc. within the vial causes water and chemical reagents to more quickly and thoroughly when the test block is agitated. At least one drain hole is positioned in a wall/side of each vial, with its bottom edge located at the fill level necessary to conduct the water sample. A valve or valves enables a user to easily drain sample water from the vial down to the proper test level. Adjacent to each vial is a color comparison display.