I bought a glass thermometer today and placed in my 11 gallon tank with tetras and livebearers inside, the thermometer shows a temperature of 31 Degrees Celsius! 8O This seems too high for those fishes right? But i feel the water with my hands, its quite cool. The thermometer is accurate, I place it in the fridge and the temp drop constantly. Hmm I would like to know that if this kind of temperature would bring harm to my tropical aquarium fishes in a long term basis?