swim at bottom

Hi everyone! My betta, Finn, recently passed away and yesterday I adopted a new, healthy koi plakat! His name is Gilbert ("Gill" to go along with the anatomical theme ;)) and he's a little gem with an awesome personality! I was also very bad yesterday . . . I could not walk away from a male...

Im not to sure what is wrong with him. I went away for 3 days and fed him 3 pallets before i left and when i arrived home he was on the bottom of the tank swimming side ways. He usually sits on the bottom of the tank and when i lightly tape it or drop a pallet in the water he swims up but this...

I got my betta 3 days ago. My 2.5 gal. tank, filled with conditioned water that had been standing for 24 hrs. It has gravel, a filter, a heater, rocks, and plants. At first he swam at the top. I didn't feed me the first day, and 1 pellet day 2. He didn't eat. Then he swam at the top. He's...