i just added my pleco (hes at leats 2) ive moved him around alot cause he grew really fast and it never bothered him hed swim around like nothing change but i moved him from my 37 gal and put him in my 125 and he turned really pale and hasnt moved since i put him in im worried he is stressed what should i do my ph is 7.4 ammonia is 0 nitrte is 0 and he just wont move