ok, i have a single 5-6inche female flowerhorn in a 30 gal tank, she been in there for almost a week now. i didnt fill the tank all the way with water, left probab a few gallons, (cause i was still about to put gravel and stuff in it) she was fine the entire week. but when i decieded to fill the tank up all the way with water. she started swimming on top of the tank, then she wont move from the corner, now she kinda tilting!!!help, what did i do wrong?? i added cycle(bacteria in a bottle, just a few drops with the new water added) and used warm water!!