Ive Had Betta Fish Before But They Died Due To The Whole Plant On Top Of The Vase Setup That My Mom Created...she Thought It Would Look Cute...anyways.......i Recently Moved My Fish From A .5 Gal Tank To A 2.5 Gal Tank....he Was Doing Fine And Everything....but Now He Wont Eat....and He Sits At Either The Top Of The Tank Or At The Bottom And Does Not Move....and When I Say Does Not Move I Often Pass By Him And Think That He Is Dead....i Dont Really Know What To Look For On Him Or Anything To Determine Disease. I Probably Should Have A Filter Of Some Sort And Some Kind Of Heating But I Dont Know Where To Get One At That Will Fit A 2.5 Gal Tank. I Cant Get A Bigger Tank Due To Space Issues....i Also House 2 Hamsters In My Bedroom In Separate Cages And Live In An Apartment. Any Advice On Saving Stir-fry (thats His Name...boyfriend Named Him...lol) Would Be Greatly Appreciated...