corys acting wierd

[petitericeball]

today this morning my other cory wasnt schooling with my other cory
i thought (s)he needed rest but its about 7:57 now and (s)hes still doing it
(s)hes sitting on the bottom and every now and then (s)hell make a mad dash around the tank i dont know if this is a tank condition or a disease... my temp was about 4 degrees higher then it usually is because i moved my tank and my heater is getting use for the new room... its 82 and i moved it down a lil bit... oh and its color is a little bit ligher then the other corys and (s)hes not eating as much as the other either... i think (s)he came a little lighter colored but now its really showing

 

[petitericeball]

i figured it out
one doesnt like the light on (10/50 watt light) and the other one doesnt care i think it might be too bright... in a 5 gallon... i dont know if thats too bright because the 10 goes for the 2 per gallon but i dont know if its suppose to be 2 incandesent or 2 floresent watts for a tank