Hey guys, I have a female betta fish that was in a sorority tank of 3. The other 2 bettas ended up passing and ever since then she's been just lying around the tank showing signs of depression. Its not depression from boredom because she was in a 15 gallon tank that was heavily planted with both real and silk plants. I then transferred her to a 20 long that has a jungle of grass, so there are enough things in both tanks to keep her interested at least for a bit. She also didn't explore anything when I added her in the 20. Which is more proof that she is mourning her friends. Now I cant just sign her up for a therapist and most of the articles online are towards bettas in smaller tanks that got bored of their situation. I was wondering if any one else has dealt with this with success. Both tanks she was in had the same parameters of 8 PH and 0 on ammonia, nitrite, and nitrates. I've also had another betta that had a friend die and became depressed from it though that one was a sorority of 9. After the death I introduced another female to make it odd again. Even though there were new and old girls in there she didn't get any better and passed so I don't think more bettas would fix the issue, I also don't want more. She still eats which is why I haven't euthanized cause there seems to be something I can do I just don't know what. If you guys want a picture I can, but she doesn't seem sick. Thank you guys in advance.