Ive been having issues with my Betta after I left my country for 3 months, while my friend looked after him. His fins are much shorter, and he doesnt swim like before, but I dont know whats wrong with him. I tried soft medications like salt, almond leaves, stress guard, but nothing helped!
So I used The Med Trio from Aquarium Coop, but the next day he was not moving, and the water current was making him move like he was dead! I freaked out, but when I touched him, he moved a bit and still breathing.
All the other fishes are acting normal and happy (2 Gardeners Killifish, 1 Bluefin Notho, 2 Amano Shrimp, 3 Snails), so its not the medication? Is it possible the Killifish attacked him (I moved him to this tank yesterday to medicate him)? Or maybe he was stuck in the filter and it destroyed his fins (I recently removed the sponge covering the filter)? Im not sure what happened or how to help him now.
Medication: https://www.aquariumcoop.com/products/the-med-trio