Okay so i JUST put my betta in a 5 gallon with a filter and a heater. it suddenly turned foggy. my betta has also been "sitting" at the bottom of the tank. my parents say that him probably sleeping but i d k. i also wanna clean the tank, but i cleaned it last night, and my parents say it will hurt the fish. so can i put bags of water in the tank till they reach the right tempurature then let them go in???? help.