I currently have an oscar in a 20 gallon tank for now while I get a 50 gallon set up for just him and only him. ever since I have put in an aquarium hood and LED lights my oscar has been acting funny. he will attack the glass, some things will set him off and he will start swimming fast into the glass and last night he lost about 6 or 7 scales on the top of his head. I have plastic plants along with java fern and java moss in the tank with him. the only solution I can think of is to upgrade him as soon as possible, is there anything else I would be able to do?