About a week ago my betta began acting weird. For about 2 or 3 days he stays upright in the water with his head poking out of the top, but would not eat. Then he began to literally lie on his rocks all day everyday. I had just cleaned his tank that weekend. and I think that might have been the issue since the Monday after, the area I live in got a water advisory. Anyways, I cleaned his tank again with a 100% water change instead of the usual 50-75% depending on how long I let it go. I always put aquarium salt in his tank, and put a little extra in. I also started giving him melafix twice a day because his back fins have almost disappeared over the last week.
As of today, he's doing a bit better. Instead of lying on his rocks he's up in a plant resting. However, I still haven't gotten him to eat though and I'm really worried about his fins. If you have any other suggestions for me I appreciate it. I've had this guy for 1.5 years now so I'll be pretty upset if he dies.
Also, I cleaned my 2.5 year old betta's tank at the same time that I cleaned Sparty's, and he has had no problem whatsoever, I don't know if that'll help. I'm just trying to give you all the information I can.