The first thing to ask, is the water pure white or greenish? Greenish is an algal bloom, white could be algae or most likely a bacterial bloom.
Since you have just done some rearranging, a bacterial bloom is the most likely. These bacteria feed on organic chemicals and if you've disturbed the substrate you will have released a lot of organic chemicals - decomposing uneaten food, bits of dead plant and fish poo.
Bloom bacteria multiply very fast; faster than you can keep up with doing water changes. The only option is to wait it out I'm afraid. Eventually they will run out of food and die.
In the meantime, they will be using oxygen in the water. Bloom bacteria don't harm fish directly but they do make the water oxygen deficient. Sometimes enough to kill fish.
If it doesn't already, I would move the filter so that the water outflow makes ripples on the surface. And if you have an air pump with an air stone, or even a deep sea diver, use it as that will churn the water up even more.
And although water changes won't help get rid of the cloudiness, they will help remove anything that we can't measure for that ended up in the water after the tank redo.