I want to change my substrate.

[mdaniel2882]

When I set up my tank I did very little research and used crushed coral for a substrate. After about a month I took out most of the coral and put in sand. now 7 months later the aquarium is doing great. I have 3 pepermint shrimp, several nas. snails and several marg. snails. 2 O. clowns, a six line wrasse, a yellow tang and a flame angel. as for corals I have a hammer, frogspawn, a small zoa colony and a mushroom rock. About 50 lbs LR

Here is the problem....I don't like the little bit of crushed coral I left in the tank. the pieces keep working thier way the the top of the sand.

Would there be any issues with removing everything from the tank and putting in new arg. sand. I just want ALL the crushed coral out I would house the LR and the corals in a 30 gal tub from wal-mart and the fish in a 20 gal aquarium. figure it will probably take me about 8 hrs

1. will I see a cycle?
2. should I put the same water back in the tank?