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OMG yes. You can really feel it when you don't have a wet suit.As a diver, I've seen vertical thermoclines where the temperature can change drastically in an instant. You can actually see the temp change as it kind of looks like oil and water coming in contact. It's kind of natural and happens all of the time.
I've got my temp controller set to come on at 78 degrees and go off at 79. I've seen temp go from 77.? to near 80 depending on time of year and ambient room temp with no adverse effects. In my opinion, minor temp shifts, even rapid ones are not a cause for concern.
Great thread, have been wondering the same myself. Was surprised all answers (so far) affirmed it is ok to swing and the variations…..thank you all for your feedback! getting pretty excited as my new tank finally has water in it as of last night!
thank you! and i feel a lot of the time if i cant find the question here someone else might have the same question in future, or even now!Great thread, have been wondering the same myself. Was surprised all answers (so far) affirmed it is ok to swing and the variations…..
Good luck with your build.
That leads me to another question! What is the best way to install temperature sensors and to place the heaters for my inkbird and hydros controller in the sump? Right now my sump goes from filter socks to refugium to skimmer section to return section. I have my temperature sensors in my refugium upstream of the heaters. The heaters are in my skimmer chamber. What is best practice here??My old tank would drop back and forth by 1* do you guys think that is ok in a reef tank?
i have my temp probe in the return chamber and heater in the chamber before my bubble trap. i think this will be fine in my case and anyone else. more or less i will be monitoring this to make sure everything is running smoothly before adding anything live to my tank.This thread certainly opened my eyes a little as I've been worrying about keeping a constant temp also.
Glad to hear some swings are all okay and more natural! I'd been thinking this was the case more and more recently as the sea temp would swing with the warm and cool fronts coming through etc.
thanks! i truly didn't think so many would be interested but figured i would ask and see! glad to hear others are benefitting from my question.+1 for the value of this thread, with my newly setup tank, I was wondering about the minimum .5 degree swing of the inkbird thermostat! My previous submersible heater on my nano seemed to keep the temp a lot more constant but I won't worry about it after reading all of these great thoughts!

pretty "cool"! ( see what i did there right? lol )Bought a chiller years back, it had a 4 degree variation built into the controller.
When I questioned it I got a divers answer, same as above.
The crazy part is that the water IME has nothing to do with the air.This thread certainly opened my eyes a little as I've been worrying about keeping a constant temp also.
Glad to hear some swings are all okay and more natural! I'd been thinking this was the case more and more recently as the sea temp would swing with the warm and cool fronts coming through etc.
I've always kept my sensors before the heaters as well, it helps prevent the heaters from just heating the water near the sensors and kicking off before the tank gets up to your desired temp.That leads me to another question! What is the best way to install temperature sensors and to place the heaters for my inkbird and hydros controller in the sump? Right now my sump goes from filter socks to refugium to skimmer section to return section. I have my temperature sensors in my refugium upstream of the heaters. The heaters are in my skimmer chamber. What is best practice here??

