I really want to put my dats back into my 240. How big should my bass be, to be safe from my dats? My bass are about 2.5 in and my dats about .5 in longer but due to the difference in body shape Im not sure if it will be ok. There are 3 dats and 8 bass is there safety in numbers. I can't see the dats being able to swallow my bass, but will they try? Any suggestions. I would wait but I need my smaller tank for other fish.