I'm setting up my new 225g 72x27x27 and I think I figured out my stocking. I currently have a large male green severum that will be in there for sure. I was thinking of doing a large group of threadfin acaras too. I have always loved them but never owned them. Would there be any major issues between the sev and the acaras? I was thinking between 6 and 8 acarsas. Only other stocking will be a few panaques and a fire eel. It has a 75g sump and it will have an fx5 before the end of the year. Any one see any potential problems? Substrate will be sand and lots of driftwood too.