well i have a 10gallon tank, only the one fish is in there ive had the fish for 4 years i just moved her to that tank about 2 months ago her gills look a little white around the edges shes just sitting on the bottom of the tank when i put the food in ive noticed she does move around a little and trys to eat the food if you can think of anything please email me at jackie38614@yahoo.com or you can message me on yahoo messenger jackie38614 any help would be greatly appreciated hate to see my fish suffer