Need advise if its safe:
Have had pool open 3 weeks have been able to keep water clear only with Aqua chem plus chlorine tabs and a bag of 1 lb shock same brand every other day.
Water tested :Alk 80,ph 6.4,free clo -0-,hrd 50,cya 0.
Pool details:Rectangle 16x36, 3ft to 10 ft. aprox 30,000 gallons. vinyl, Hayward sand filter. Water looks great.
Do i really need to add other chemicals to pool. Please advise.