Hello! My male Betta Fish that I've had for just over a year went from swimming and eating normally one day, to being very lethargic and not eating the next. I'm not sure what's wrong, whether it's some sort of disease or just old age, although I thought signs of old age would come on slower and not so suddenly. I purchased him from Petco.
I just did a water change and cleaned the tank/filter, but the levels before the water change were:
0 ammonia, 0 nitrates, 0 nitrites, 300 hardness, 80 buffer, 6.8 ph, and 0 chlorine.
Typically I haven't had high nitrates in the tank for the year it's been set up, I think because there's a good amount of plants/algae and only one fish.
I have on hand Maracyn, Paracleanse, and Ich-X, and was thinking of using Maracyn and Paracleanse in combination, but wanted to get some opinions from here first.
The only thing different I've noticed about him appearance wise is he seems a little lighter around his head. The colors aren't as vibrant and the silver color below his mouth is stronger. His scales also look like they could be sticking out/pineconing, but I'm not sure if that's a normal appearance or not. I've attached pictures of the tank and the fish.