Hi guys. My betta hasn't been doing well these past few days. He lays around all the time and I haven't seen him eat. He has shredded up his fins but no sign of infection, and he looks fine otherwise. I recently did a big water change. I emptied the whole tank, pulled out all the substrate and added another piece of driftwood and more plants. I also added my bamboo shrimp pair and two oto cats(Just tore down my 55 gallon, and I decided to keep these little guys. Hoping to move everyone into a new ten gallon soon!) I put in half new water and half old water, and the fish and shrimp were in a separate bucket of old tank water at this time. Anyways, I'm not sure what's wrong. Ammonia, Nitrite and Nitrate are all 0, and pH is 7.5. I will say my temp is a little low, but it hasn't changed at all. Tank is over a year old, fishless cycled in the beginning etc etc. He's the betta in my profile picture, and he's been in this tank since the beginning. I was hoping it was just a bit of shock, but he isn't improving. Everyone else in the tank is fine. Ideas? No chemicals in the tank at all. Everything new was from my community tank, which was very stable and had no problems as far as I was aware.
I'll also add that the media was not out of the water at all.It stayed in a bucket of old tank water the whole time.
Sorry about the messy plants. When we get back from Florida I'm hoping to switch to a single ten gallon, so for now any plants I decided to keep from the 55 are crammed in here!