So what if you go crushed coral......and your water doesn't clean out?
As it it looks hazy even after 24 hours of cycling.
Don't worry , sometimes it takes two days before it's completely clear.
Little by little that silt will come out when you do a gravel cleaning.
If you must have it clear as soon as possible, go to the store and get one of those plastic bushel baskets . (which you can use for other things when you are done.)
Then put your crushed coral out of the bag,into the basket. (do this outside)
Then turn on your garden hose, and dig the end down to the bottom of the basket in a number of places for a minute at a time.
You will see the water run over the top of the basket looking like milk.
When the water runs clear in all places around the basket, spill out as much extra water as you can, and scoop the crushed coral into your tank.
You will now have almost clear water after you fill your tank, and whats not clear will be after only a few hours.