Hi, welcome to the wonderful world of salt water hobbyist, and the MR family!
For starters you are going to find that you will get lots of different advice.
Confusing? Yes! Reason for that is that there are many ways to keep salt water aquariums. What works for one those not work for another, or vice versa!!
Ok, so you decided to use crush coral vs sand. True food can, and will get caught in it, but simple enough to remedy. You can use one of those aquarium vacuums
, or the python
to clean it. It is not the end of the world, just a lot more work.
You didn't rinse it before putting it in the tank, again not the end of the world. Yes you will continue to have dust clouds anytime you disturb it. Guess what, I have always rinsed sand or gravel prior to placing it in my tanks, and in time when ever they have been disturbed (to this day) will form the cloudy water. No big deal it clears up within a couple of hours. Another great tool to have is a Diatom Filter (mine died). They are great at polishing the water...
Second, you are using a wet/dry with Bio Balls. Again not the end of the world. Some have stated you should use live rock instead. Well, wether you place bio balls or live rock rubble in your sump/wet/dry you will have to periodically rinse them. Both can become nitrate factories if not well maintained.
Tap water vs RO/DI - I would definitely recommend the use of ro/di... Cleaner water to start with less nuisance algae in the end.
Most important of all: Someone suggested the use of hardy fish to help your cycle.
DO NOT DO THIS!!!!! It is cruel to put the poor little guys through torture. There are better ways, for example you can use a raw shrimp or a piece of fish.
Be patient, wait out the cycle period, and you & your tank will be fine.