fish observation

I noticed that when i changed the water my fish became wild nd restless after i changed the water so i decided to decrease the amount of water maybe i was changing a laege amount so the fish became stressed. on the 10th day i noticed that tequila my fish was setlling perfectly and the fins had developed a bright red colour and she was also growing in size. now she looks like a real fish and she swims freely in the tank. when i put fod in the tank i also noticed that tequila is aggressive towards the food its acting as if its hunting for the food bt most of all i enjoy tequila's company she brings life to my room. ANDISIWE 3139349