Hello, any suggestions are greatly appreciated since at this point I’m stumped. I’m still in my first year of fish keeping and am struggling to find a community or solo partner for one of my favorite fish the red fin. This is a cycled tank partially planted, 35G, and I have 2 crays and one red fin shark. I don’t plan to add much more but would like to accompany my solo fish with at least 1 other species. I’ve read and watched community tank ideas for the shark and based on my setup I feel like I’ve tried my limited options. I want to keep the 2 crays since they’re happily sharing the space and even mating at times but I do realize that limits my possible choices for additions to the tank. At this point I have tried dwarf gourami, black skirt tetra, and platy(not at the same time). All have been bullied to near exhaustion and I’ve transferred them over to my peaceful 55g tank(Sadly losing one to that exhaustion).