I have had a 55G running since Christmas with 3 Pictus Cast as well as other community fish. The tank originally started with all fake plants and over the last three weekends I have been replacing them with real plants. Up until then the Pictus cast pretty much stayed on the left side glass of the tank. They would move up and down the glass and take turns zipping through the bubble curtain across the back. They also relatively stayed as a school. Sine I have changed the plants around I have noticed that they have gotten much more lethargic and solitary. They have moved into the middle of the tank which is dimmer from the plants and has a few caves/hiding spots. Now they each have found a hiding spot or area in the shade and they pretty much stay there non spot. Very little movement about the tank day or night. My water parameters are the same as they have been for months and do weekly 20% changes. I am wondering if the fish are showing stress sings nor or were they showing them before?