new tank heater
hi everyone, i have just purchased a new 35ltr BiUbe it is all set up for tropical fish, the themometer is in the green section so the temp is ok on that, and the water was nice and luke warm, and then the next minute is is cold, but the temp does not drop on the themometer, just a bit worrid because i'm going to buy my fish tomorrow, is this normal for the water to be warm and then cold, i have never kept tropical fish B4, please can any one advise or help me thanx
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