Hello all long time reader first time poster. Ive got a 6 month old cube 20 that is doing fantastic.I just ordered a Waterbox Marine x 90.3 to upgrade as i already filled up the cube and want more! The cube was my first reef tank and as i said its been doing great so far. What can i do to maximize the transfer? not keeping both so i guess id like to know should i keep the sand and water? and what to do with the rock, as i believe ill be doing a new rockscape unless i can incorporate the existing one somehow. i did a fishless cycle first time around is there a better option such as putting this rock in the sump or? thank you all. im ordering another ai prime and probably another power head but thats it for now. will definitely be getting a protein skimmer as a next upgrade. Any thoughts on this are appreciated helping me think through how to transfer everything. Thanks!