I am in the process of setting up a 150 gallon for mainly different poly species and my 2 oscars. The problem is, my Senegal (which is currently in my 55 with assorted mbuna, my endi and oscars) hasn't grown too much from about 3/4 inches since I bought him a few months ago. I am very worried that if I move him to the 150 the oscars will grow and decide he would be a nice snack, as it is not too long until he is fit in mouth size. My question is, should I leave him in the 55? Or set up a leftover 20L that I have as a grow out? I'm worried he will be picked on by the Africans in there alone with them. Thank you in advance!