I know I dont have all the information you guys need but I am just about to get started. I bought a house in the fall and pulled the cover off the pool today. It is an above ground. They never used chlorine i was told, but used something else. I can only see about a foot into the water and it has hundreds and hundreds of little tadpoles in it. I attached a photo. I dont know anything about pools and a few people are recommending draining the pool. I read online mixed things about if it is ok to drain or not. I was told the pool had been opened but I think it may have been not been. I just do not want to drain and damage the pool. Also if it is ok to drain, what should be used to clean the liner?