Not very happy!

[Baker]

So im reaching out to the biocube 8 owners and the nanocube 28 hqi owners. I purchased both of these tanks off kijiji and finally got around to setting them up. I have been taking temps from both tanks. I turn the lights on in the morning before I go to work and when I get home the temp in the BC8 is 85 and the NChqi is 84. I have actually unplugged the heater in the Bc8 and temps are still getting up to 85, so i know its not a faulty heater. I cleaned the fans but i dont noticed much of anything coming out. Are these known for over heating? The temp in the apartment is 70 so i know its not that. Im at a loss. Do I need to buy new fans for both of them? I dont see why they would sell something that is reef compatable if you cant even get the temps within reef safe. Someone please help a brother out.

[Coralgurl]

What do you have reading your temps?

[Baker]

A few different things. From a float and 2 different digitals. One which I just bought today. And my digital that I use for work which I know is deadly accurate.

[Coralgurl]

I don't know a thing about the tanks you have so no help there....

what are your overnight temps running at? what equipment is actually in the water pumps, skimmer, etc. that may be throwing additional heat into the tank...

I'm noticing at even 18+ in the house, my tank is above 80. I turned off one heater, but my night temps dropped too low.

[Baker]

Night temps are dropping maybe 3-4 degrees.

[Matt@NoLongerInUse]

maybe put some kind of spacing between your lid and your tank. to let the air flow to help control your temp.
just to see if it helps.
it could be your return pump. getting old and heating up more. i would also try cleaning them to see if that helps.

[Baker]

Cleaning the pumps?

[Proteus]

These are metal halide lights correct?

[Baker]

The NC28 is.

[Proteus]

Thad be ur issue. I think.