Can anybody tell me if this is ok.....my temperature in my tank is not steady at all....I have 2 thermometers in my tank, this morning they were both reading in the higher 70's...one was about 78.5 the other was 75. Now that the lights have been on for awhile and the house is warmong up one is at 80 and the other at 81.5...what is the safe temperature range???
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