I recently added a black mystery snail as well as a peppered Cory to my bettas tank (yes I know you’re supposed to add them in numbers but I’m jobless and couldn’t at the moment) but my betta is aggressive only towards my Cory not the snail this is my second snail as my last one passed 2 weeks ago(idk why) . But I decided to impulsively buy a 10 gal to turn into a community tank since malfoy is aggressive I made the decision to put him and his snail in his 6.5 gal and turn the 10 into a new setup. I currently have a yellow guppy.zebra danio. Blackskirt tetra and my peppered Cory in the 10 gal . Is there anything I can add to the ten to promote the tank (fish wise) I want a pleco but I believe a 10 will be too small for him.