Ключевые слова: background, balance, bright, check, chemical, chemicals, chemistry, chlorine, clean, cleaner, clear, color, concept, day, environment, hand, home, house, kit, laboratory, liquid, measure, measurement, mini, outdoor, ph, pool, quality, red, resort, result, safety, service, small, space, summer, sunny, swimming, swimming pool, test, test kit, tester, tool, transparent, tropical, tube, water, water testing, wet,