Ключевые слова: acid, background pool, care, chemicals, clean, cleaner, cleaning, disinfection, health, isai, maintenance, maintenance pool, man, measurement, mini test kit, person, ph test, ph test kit, ph test pool, ph water, phenol, pool cleaning tool, pool maintenance, pool tools, pool water, protection, purification, purifying, sanitary, service, swimming pool, test, test kit, testing, treatment, water cleaning, water purification, water testing,