Hrmz, imo...no matter how "cycled" your LRs are, a mini cycle will still start during the transfer. The LRs, sand can go immediately into the new tank with NSW but for LS and corals, i'll suggest waiting for abit and make sure your water parameters are ok before transferring them over. Btw, why not make a jump and upgrade to a 5 footer instead. 3 to 4 like not much diff. Just my own opinion...