hot tank why?

[Beemo]

i dont know what happend. the tank has always been 78, yesterday i bought a maxi jet 400 power head and replaced the bulbs in my light fixture. i have no heater since my house is pretty warm so the temp is always 78 in my tanks. i just went to check on the amonia and i felt the tank was mad warm! i panicked, i grabbed the thermometer and it said it was 84! whats making the tank this hot? is it the light? is it the maxi jet??
i have no live stock just live rock, but i saw this little whitish bug shrimp looking thing come out of a pin hole in the rock and he was freaking out, i hope that lil thing will live through this heat wave.
will the live rock be affected by this temp?
i will give some info on my lighting. i didnt by anything fancy yet since the tank is still cycling so all i have is the basic perfecto hood with incadescent light fixture, but im not using incadescent bulbs im using this by coral life....
Self-ballasted, low operating temperature bulb fits a standard medium base.

High-intensity output 50% 10,000K daylight and 50% actinic 03 blue light
it sounds like it shouldnt cause any heat?? it is hot to touch but arent all bulbs hot? lol
my tank is 10 gallons with 15lbs of live rock, fiji, solomon, tonga
do you think its the maxi jet? the lights are off now and if the tank cools off ill know its the bulbs (there is 2 of them)
now what? should i just buy a reg flourescent strip light? at least i know they dont warm the tank. will that lil bug survive this?

 

[BurntOutReefer]

both are causing it.... IMO....

 

[Beemo]

oh thank you for replying ive been waiting patiently lol
so now what do i do? get rid of both?

 

[lfjewett]

Well untill you find a better solution use a small clip on fan to cool the water. As water evaporates it will cool the tank. Eventually you'll want to wire up a computer fan or something to run and keep your tank cool.

 

[capefear]

yes a fan.

 

[bkwudzjeep]

The light and the powerheads create heat and radiate through the water. I would say the lights more than the maxi's.

Like the others said, a fan will help and I am actually getting ready to wire up some fans too....

The amount of fresh you have to replace due to evaporation will increase too. Your little bug may be an amphipod and he should be ok....once you add fish, he may become food, but if you run a small fuge, they can reproduce in there.

Being in FL, many tanks around here are run a little hotter than others because of the expense of a chiller. Mine runs pretty consistently at around 82-83 when the lights are on. Another reefer in my area keeps his at 83 all the time.

Do some research on the fans, some may be quite loud from what I have heard.

 

[Cutiewitbooty]

I would say it's both too. I have a rio 600 (the do produce ore heat than most pumps) for my skimmer and when i have it on it bumps my temp up about 2 degrees, my lights make my temp go up about 5 degrees and i only have 40 watts. I would worry too much if my tank get to 84, but i would thanks that anything over 85 i would get a clip on fan. If i remember right i think i read somewhere that the avrage temp for a reef in the ocean is usually like 83. I'm in south Fl and during the summer the ocean is around 85 degrees.