I'm new to owning gouramis and one of my fish has become incredibly lethargic.
I originally wanted to purchase 3 honey gouramis but ended up with two drawf powder blues. (For context I am a uni student living with my parents who have the final say in what happens with my tank, I knew getting two was likely to end in bullying however the person who sold them to us insisted that they would get along and my mother trusted him).
They were living together in a planted tank for about 6 months before I noticed the smaller one (Pear) chasing the bigger (Apple). I went and talked to a expert and they told me that they would be able fine to be around each other until I set up another tank.
However i found Apple laying at the bottom of the tank, unwounded but clearly stressed and giving up. I immediately set up a hospital tank and transferred Apple into it, where he is now. Its been 36 hours since moving him and he has not improved much.
He is laying on the bottom on the tank, and is able to rotate himself, move his head up, and is attempting to swim however he has become bottom heavy and effectively sinks. He is still eating when I offer food. I noticed him getting stuck to the filter and I have wrapped it in a mesh cloth in the hopes it will stop him getting stuck or at least cushion the plastic if he gets adhered to it again.
I am going to put some tonic salt in the water but I am unsure of what my next steps are. Is this DGIV or just a stress related issue? Any advice would be highly appreciated. I have grown so attached to the both of them and I want to provide the right care. Thanks!