Ключевые слова: analysis, background, blue tile, bright, check, chemistry, chlorine, clean, clean water, clear, clear water, color, concept, drop, environment, hand, home, kit, laboratory, level, light, liquid, measure, measurement, mini, mini test kit, motion, outdoor, outdoors, pattern, ph, pool, quality, reflection, result, scene, service, space, summer, surface, swimming pool, test, test kit, tester, tool, transparent, water, water testing, wave,