I have a betta named Misty. After she got used to me, she would be very energetic. I've had her for five months and she has been perfectly healthy. But today when I cleaned her tank, she stopped moving. All she did was move her eyes to look at me. I don't know what to do!!!
I took out my fish with a net and poured out all the water. Then I took out the stuff and scrubbed them as usual then I put everything back in and put tap water in the tank. Then I poured in a chemical called betta plus, which is supposed to make the water safe for bettas. I put my fish back into the tank but she didn't really move when I put her back on her shelf.
not other than the temp change your not supposed to do a complete water change where you clean all the gravel etc...you are prolly having ammonia and nitrates which can hurt bettas some will survive the cycle some wont