I bought my coralife biocube from someone on craigslist so it already has a little character. This is the condition it came in, tiny bit of sand in there still, barnacles forming on the back piece already. I believe this is a good thing Filled with 10lbs dry sand that the former owner had given to me and 20 lbs live sand I purchased, rinsed with salt water 3 times before adding (instant ocean), it cleared up within 24 hours which was surprising, I thought it would be cloudy for a few days! I did put a fake anemone in there just for the heck of it - it came with all the swag I got from the former owner. Last night I got my rocks in the mail, they are huge!! and heavy!! Tonight I will begin chiseling away per @Nart s suggestion! I found the size of the rocks rather daunting last night and was ready to order something else as I slammed the rocks on the pavement in my driveway trying (and failing)to get a break. I'm sure this behavior at 9pm was both confusing and amusing to my neighbors, lol. So this is only the beginning, my first SW tank and only 4 days old. Can't wait to get this up and running!