How warm is too warm?

Never seen that before. What's the width of the clips?

 

Not to mention I like to keep a clean modern look. Fans make that a bummer

 

There are 2, 3, 4 fan and larger options as well. The width of the clip is 1/2".

 

I just seen the 2 fan option. It looks pretty legit. I'll probably order it tomorrow.

 

Lots of great advice on this thread.

FWIW- In the wild where sea temps are nearly constant, corals will start to bleach in just a few days with a sustained increase of only 2F; a sudden increase of 6F is almost instantly lethal, so yes, you most likely have more than one issue at play, here.

 

My 150 reef has been running about 8 years. EVERY summer I had issued with heat. This year I added a power head and tilted it upward a little so that the water is rough and choppy on the top. No more heat issues. My tank isnt covered either.

 

Hmmm, sounds like something worth a try! Thanks for your input!

 

Since I have had my Reef Angel logging temp, I've noticed big swings going up to 84 a couple times. I am considering the Nano Chiller by 3reef sponsor Chill Solutions. I also will be looking at chiller deals at MACNA this weekend. It doesn't happen often but I need to get the swings under control.

 

It really depends on your particular corals. Chances are, the inhabitants of your tank aren't from the same area or depth.
Shallow water Indonesian corals thrive in 83 F, whereas coral from southern Queensland will be happier around 77.

Here's a great article. http://web.archive.org/web/20030218...om/fish2/aqfm/1997/nov/features/1/default.asp

 

My temp stays at a constant 77 degrees with a chiller. Corals seem to love that temp.