Greetings all! Just joining as looking for help as a first time pool owner. Pool is above ground and previous owner winterized it before we moved in. Opening it was a challenge to say the least, learned tons! Been dealing with high alkalinity from day one, but a week ago I finally had perfectly clear and balanced water. Then I vacuumed...which the hose apparently had algae in it. Now it's green again and I'm just sick it will never straighten out. Help!!