Similar images (10 photos)

Woman dripping sample of swimming pool water into Petri dish to check PH level outdoors, closeup

Woman holding glass tube with sample of swimming pool water to check PH level outdoors, closeup

Woman holding glass tube with sample of swimming pool water to check PH level outdoors, closeup

Woman dripping sample of swimming pool water into Petri dish to check PH level outdoors, closeup

Woman holding glass tube with sample of swimming pool water to check PH level outdoors, closeup. Space for text

Man holding test tube with water against swimming pool on sunny day. Space for text

Man holding test tube with water against swimming pool on sunny day. Space for text

Man holding test tube with water against swimming pool on sunny day. Space for text

Man holding test tube with water against swimming pool on sunny day. Space for text

Man holding test tube with water against swimming pool on sunny day. Space for text