wake up this morning at 7.30 to feed the fish. I went turned on the light and say red gasy die floating around. Soon i noticed it was the thermometer. It was cracked. The mercury ( the red stuff ) was broken. I have two in there the other was reading 26degress celcius. I dont know how this thing broke. But my concern is are my fish going to die. I did a 50% water change i have checked the water parameters everything so far is okay. i need help