Thanks so much for all of the suggestions. It's really hard when you have a fish that you really like (the Del) and they are getting hurt. I don't feel like I can do a divider because I already feel like a 3-foot footprint, even with 18" width, is a little on the small side. Maybe if I had started with all 3" polys, or started out with 3 right away I would have had a different outcome. 
I was so desperate yesterday that I even seriously thought about going to PetSmart/Petco to see if they had Senegals but I just cannot get myself to buy fish from these places - I don't trust them. So that tells a story right there. LOL
I was so desperate yesterday that I even seriously thought about going to PetSmart/Petco to see if they had Senegals but I just cannot get myself to buy fish from these places - I don't trust them. So that tells a story right there. LOL