today was my first water change since i got my baby p's and they got stressed as f*ck? there more stressed than when they came in the mail? the only thing i did was added some rocks to the tank and a 20% water change? i saw one P trying to dig thru the sand to do under a rock?? i moved the rock and he freaked out big time and swam faster than i have ever seen any fish swim before and he headed for some more rocks but this time i lost sight of him so i'm worried that he'll try to go underneath them again? will my P be okay or is he so freaked that he won't be able to come from underneath the rock and die?