I got a new fish this past sunday, and changed his water for the first time today since it was getting fairly cloudy. He was really active in the store and the past few days, but today he is just hanging out at the bottom of the tank, kinda hidden under a turtle rock we have for him. Is this just because of the stress of the water change, or is there something else wrong?
-purchased on Sunday
-1.5 gal. tank
-bamboo stalk for vegetation
-turtle-shaped rock/decoration in the corner, he has always liked swimming under the turtle's neck since it is like a tunnel
-before today: he would swim around a lot and come over to see you if you stopped to look at him; he ate regularly and excitedly (2-3 pellets 2 times a day)
-new water was tap water that had sat out overnight (to get it to room temp) and had been treated with TopFin conditioner to remove chlorine
-since the water change: he hangs down at the bottom in his "turtle tunnel", he swims up quickly for air then quickly back down to the bottom, but he still eats like he did before today
what do i do to fix this??? please help!!