So i just got my BGK and he was doing good all day. he jumped right into a cave and chilled. So i turn the lights out and hes out swimming and stuff. i step out for 20 min and i come back to see that he is developed a whitish film on him. It seems to cut off at a certain point but im really freaking out. is this natural on day one for these fish or am i doing something wrong. i wish i could tell you guys more but i dont have the testing supplies to get all the info like ph and nitrates. how can i help him?!?!?!?!?!?!