Copper just doesn't cause cloudy water - I've dosed copper (ionic and amine based) thousands of times in a variety of systems and never got cloudy water as a result. Copper can kill beneficial bacteria (usually around 25%) but that results in an ammonia rise, not a bacterial bloom.
There are some rarer causes of cloudy water that probably don't apply here: I had a few cases where the tanks looked cloudy like this and we couldn't figure it out. I then had the person remark "but it looks better when I look down on the tank". Turns out, the cloudiness was just a white film of bacteria on the glass. I've also had issues with chemical reactions where a precipitate formed in the water, causing an inorganic, white cloudiness. You haven't added any other odd chemicals, right?
Jay