Cosmetologist with client in the medical center
Unrecognizable man using a ph and cl kit to test the pool water quality.
Unrecognizable woman show ph and cl kit and a pill to test the water quality.
Woman hand filling ph and cl kit with pool water to test the quality.
Unrecognizable man using a ph and cl kit to test the pool water quality.
Unrecognizable man showing a ph and cl kit to the camera.
Unrecognizable man using a ph and cl kit to test the pool water quality.
Unrecognizable woman showing a ph and cl kit to the camera.
Young caucasian woman using a ph and cl kit to test the pool water quality.
test tubes with liquids, flask and indicator paper
test tubes with various liquids, flasks on table
test tubes with various solutions, bottles on desk
gloved hand holds wet litmus paper on test tube
hands holding pink acid litmus test and test tube
hand holds neutral litmus paper on test tube
top view of test tubes with liquids and solutions
test tubes with liquids and used litmus papers
test tubes with solutions, flasks and indicators
test tubes with solutions and used litmus papers
test tubes, bottles and indicator papers on desk
test tubes, flasks and litmus papers on table
