So, I've been thinking today (which usually gets me in trouble, and always cost me money). We just recently setup our 75G with a 30g sump and Deltec skimmer, the original idea was to get rid of both of the Biocubes, but the Misses wanted a Puffer...so we got a Stars and Stripes Puffer for one of the Biocubes. Part of the reasoning behind getting the larger tank was to have less tanks to take care of, ie water changes,testing etc. But now with the Puffer, we have just as much work if not more than before, which brings me to the point. Would it make since to setup another tank (not the biocube) next to the the 75G and drill it,so we could share the benifits of the larger water volume,skimmer,live rock and the Apex controller? Or would that create too much bio load? If it would work,then we would sell the Biocube,since I don't really want to drill modify it (I'm always concerned about resale value if I modify something). Anyways, thanks for your thoughts and advice.