Tank staying heated with heater off

  • We are currently upgrading MFK. thanks! -neo
R

robert511

Exodon
MFK Member
Dec 14, 2013
115
2
23
orange county ca
Just a question about 6 weeks ago I set my 500 gal 1 inch thick acrylic and turned my heater on when the tank was at about 82 degrees for a week I was leaving for work for a week so I unplugged it and just told my wife to watch it and if it drops past 78 plug it back in well it has stayed between 79 and 83 for the past 5 weeks with no heater I have even have done 3 water changes and still is 80 degrees I have no hot light just LED'S anybody have a guess? Thanks
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Do you have any wavemakers, powerheads or other motors that can produce heat. I leave my heater unplugged because I have two wavemakers, a 3200gph and 1600gph in my 100g (I know, lots of circulation) and my water stays at a steady 80.2-80.6. I have a digital thermometer so my temp readings are pretty accurate.
 
No all I have is a pump in sump and a pump in overflow box thanks it I also have 3 thermometers I digital they all read the same

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I agree with the pumps, while my tank is only a 180, its bottom drilled for a UG system, 2 pumps. I have this reversed with large sponge filters on the intakes. in summer i need no heaters, water through the pumps heat the water.
 
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