Thank you so much Eduardo! We will be providing more reefing info for a long time!

Glad it works out for you. For me, just running a fan over the sump for a few hours a day made all the difference. It really depends on the environment that's housing the tank and the gear in the tank.

Personally, I feel that 75 is too cool. Most reefers agree to target 78 degrees. Heaters are pretty cheap, so you shouldn't have any issue getting your tank up to the proper temperature. Thanks for the question!

Fish are much more adaptable than corals (generally speaking). If you'd like to lower your tank temperature, I would start with some fans blowing across the tank and/or fuge. That will increase evaporation, which will help it cool. Be aware that increasing evaporation will mean you'll have to be adding more top-off water to the tank. If that doesn't work, then you can look into if you want to invest in a chiller. Personally, I'd try the fans and then see how the fish are at the 80-81 degree mark. Thanks for watching!

Thank you so much for your reply

I'd try to keep it a bit cooler at 78. How old is the tank?

about a 8 months not counting dry rock cycle

@@ImNate69 There are reefers that keep their tanks above 80 degrees with success. Most will tell you that it takes a lot of time to acclimate their corals/fish to those temps. If you can, perhaps mount a fan blowing across the surface of your tank. That will lower it quite a bit.

Ok thanks

I am setting mine up to target around 85F. The way I see it is the change in temperature that really gets you. Right when you start hitting a little over 80F is where psychrotrophs bacteria start to die off. I think this is the reason that tanks that run cooler can't take a spike in heat. But the mesophile bacteria are fine at 86F and can take a spike in getting cold. If you look up the temperature of most coral reefs, they are in the 82-86F range. I wouldn't just go and move a coral from a 78F tank to an 84F tank, as the bacteria in the corals body may start to die. But going the other way around is fine. I think people would need a QT tank to slowly move up the temp. In short, my 2 cents are that psychrotroph die off, is why tanks can't take a spike in heat. kzfaq.info/get/bejne/nc9grcKa2dHHqZc.html . (Bacteria in the tank love heat, so it will be a drop in O2 until the bacteria consume what they can. Then the O2 levels should stabilize, just another reason why tanks can take a spike in heat. But it is not an issue, if you are always running high )