I've seen pictures and videos of fellow cichla keepers and all seem to have silver arrowanas and peacocks together only. What about australians and peas? Will that combo work or would the aus be too aggressive? My monos and tems (all are about 12-15") are getting big for my tank and my brother has a 400 gallon tank with just one 18-20" australian arrowana in it. Should I risk the move?...not toooo worried about the monos but its the tems that I'm worried about. Help?!?