nitrites

[digitalsteve]

if i were to change the tank substrate ( i have a star to clean the bed) to something other then sand would i have to cycle the whole tank again , and would a 40 % water change affect my other livestock ? ( purple pseudochromis and 2 clowns as well as various lps, and sps ) would this eliminte a large amout of the nitrites( also i want a brighter substrate and something that wont cloud up every time i move something in my tank )