As above .. plus what type of thermometer do you use ?
If it's a heat mat - size of tank / size of mat / where the mat is situated etc
If it's a ceramic bulb set up - dimensions of tank including the height - where the bulb is situated : is it guarded etc
As mentioned a photo will be very helpful as well .
Oh and ideally please write in bullett points or chunks rather than a massive block of text
As much info as possible will make it easier for us all to hopefully advise you ..
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