I resisted the urge to add Cyps to my 55 until I upgraded to a 75. It is possible to keep them in a 55, I just chose not to based on research I had done. Jumbos or not, they really do best in schools of 8-10 at the minimum. In my humble opinion this is too many for a 55. A 75 is also a 4 ft, there is just more width. With Tangs, I choose to keep lots of rockwork spread out through the tank... you'll find you're going to need plenty of rock-work to keep these guys from constant bickering. The more structure, the less open swimming space.
As far as the Comps and Calvus go... I would watch for aggression issues. From personal experience, it is tough to maintain 2 adult males in a 75, let alone a 55. Perhaps yours will be different. Only one way to find out eh? The advice I give is based on my personal expererience and research. Others will come to different conclusions.
At some point though an upgrade will likely be needed. You have years depending on the size of the comps/ calvus when you purchase them.. but it will happen... happened to me, lol.
As far as the Comps and Calvus go... I would watch for aggression issues. From personal experience, it is tough to maintain 2 adult males in a 75, let alone a 55. Perhaps yours will be different. Only one way to find out eh? The advice I give is based on my personal expererience and research. Others will come to different conclusions.
At some point though an upgrade will likely be needed. You have years depending on the size of the comps/ calvus when you purchase them.. but it will happen... happened to me, lol.


