Doesn't sound so much like doing something wrong so much as you need some patience.
1. No matter how much you wash substrate new substrate tends to cloud the water for a few days.
2. All effective biomedia will produce some dust when new. Rinse it off and it will clear in a couple days.
3. Your tap water may just be cloudy. It happens. If left alone it will clear up in a day or two usually.
4. There is no such thing as an "instant cycle" using cycled filter media will speed the cycling process, but you WILL get small spikes and you will most likely see a bacteria bloom unless you have enough cycled media to support your entire stocking.
Bottom line just leave it alone for a couple days and then see where you are at. 6 hours is nothing.
If you cant be patient, then stockpile some money and buy a magnum and a ton of water polishing cartridges, or a diatom filter and a high quality uv. It wont fix any issues but would clear the water super fast.
