Hey Extreme_one
Thanks for the comments. Its taken me a while to get the tank how I like it, natural looking.
Yeah the tetra's are the last of shoals. The cardinal was one of my first fish in the tank so about 4 years old and the rummmy nose was rescued from a smaller tank when the others all perished. About 2/3 years old.
That is the plan to move cardinal over, it is very shy and timid on its own. Only really see it at feeding time. Would be lovely if the new shoal "fostered" it.