4109creighton

Hi all, I am a newbie to hot tubs, I have had my 1500L hot tub set up for just over a week now and already I have had to do a water change due to a film which leaves grease on my hand constantly appearing on the water no matter what. When I do a water test the PH is fine, Total alkalinity is fine and chlorine is fine. However every morning when I do a test the chlorine has completely disappeared and I have to put a dosage of chlorine in the water again. It still does the same thing even after a complete water change. It also seems to be leaving a sticky scummy scale round the side of the hot tub sides and I am constantly having to wipe this away. The water is also slighty cloudy, has a slight tint to it. I am not sure what the problem is, or what I am doing wrong that could be causing this ongoing problem. I hope someone can help me out! All help would be greatly appreciated. Kind Regards Luke. More Information: The chemicals I am using are or have are: Chlorine Granules, PH Plus, PH Minus and I also have some ANTI-FOAM.