I recently have dealt with an ICH problem in my 47 gallon aquarium and all seemed to be fine. The temperature was still set at 84 and had been in the ranges of 84 and 86 the past 10 days. Tonight when I came home I found 1 of the dwarf rainbow fish that I have dead. All the other fish appear to be ok. Does anyone know if temperatures between 84 and 86 are bad for the fish? I turned the temperature back down to the normal temperature it use to be at which was usually in the 78 to 81 range. We have done several water changes over the past few weeks it appears that the rest of the fish are all fine. Im not sure the test kit I have is the most accurate for testing the water. Is there one anyone reccomends that is better , and more accurate I know strips are not good. I will go buy a new test kit tomorrow to recheck the water parameters to be safe.