Hi I am a new Betta Fish owner. I have a 1.5 gallon tank, heated to 84 degrees, with a filere, light and 2 silk plants. I just purchashed a male Betta for my tank. I was told he is less than 1 year old. I am concerned since I brought him home 2 days ago he is very docile, he just lays on the bottom of the tank. He has not eaten but did poop. Can someone please give me some insight? Thanks.