I would suggest you stop cleaning everything in the tank as it's doing more harm than good and could possibly be the root of the problem. Place a white sheet of paper behind the tank and look at it from the front. Is the cloud a green cloud or a white cloud? If it is green, it is an algae bloom but I doubt it since the tank is new. What you probably have is probably a bacteria bloom. The problem is, each time you clean the surfaces of things though (the plants and decor, possibly the filter pads, the filter itself), you are keeping that cloud going. You need to allow this bacteria in the water to settle where it needs to, constant cleaning is not allowing for that. Allow the cloud to be there and follow with your regularly scheduled maintenance schedule of water changes/gravel cleaning once a week if not more. Post your nitrate/nitrite/ammonia levels too once you get the kit so we know there isn't anythng else going on in your tank.
