Ok so we signed a two year lease on a house with a pool. The pool care is included in the rent (although Its just some guy not a company) and he comes weekly to do... Well I'm not sure what he does. Everything was great for a couple of months until we had a heater installed. After that the Polaris stopped working and gets tangled up on the wall. And now the pool has turned completely green. I ran into the "pool" guy yesterday and he said the landlord told him to come back and pour the remaining half gallon of muriatic acid in the pool. He then told me to put the chlorine floated back in the water the next day. That's been done but I just went outside and the pumps not running. I think it's time to take matters in our own hands as we would like to enjoy our pool. I seem to remember my dad shocking our pool growing up whenever there was algae present. Never heard of muriatic acid? Anyways can someone just tell me what to do to get it clean again? I can send pictures if that would help.