My reef stays at a balmy 82-84 on very hot summer days it went to 86 with no effects on anything.
In nature the temps jump around, it ges even in te 90s on some days, so I don't think that temperture being always steady is as important as SG, PH and the rest.
Originally Posted by mdftla http:///forum/post/3190772
Thanks to all..mine has been running 78 - 82 and I didn't know if a 4 degree swing was to drastic ?
It depends on the animals you're keeping. Generally, 4F isn't too big of a temperature swing but it's on the edge in my opinion. If you bump up your heater 3 or 4 degrees I think it would be an improvement.