I have a 65 gal
salt tank that I have serviced every two weeks by an aquarium service company. They have been working on my tank for about 6 months. My thermometer, before they started on my tank appears to have not been working correctly. We now have a digital thermometer so we can monitor it better. The tank runs from about 81 to about 83-83.5. We have taken out all of the powerheads so the only things running in the tank are the pumps in the sump. The UV
sterilizer is off and so is the heater. The main pump is a Magdrive 700.
The service company says that they don't know why it won't cool and that my only real option is a chiller. They suggested a fan in the cabinet over the sump, but I don't think there is enough water surface area under there that would make a difference.
What do you guys think is the reason it won't cool and the best way to get it to cool?