power heads causing heat?

[vaderbanger]

yesterday i installed a maxi jet 400 power head on my 10g
the temp was 78 (no heater in tank) tonight the temp is 84! is it the power head? are they known to make tanks hot?
there is another possible cause, my lighting, i just bought new bulbs yesterday to fit in an incadescent fixture. they are coral life 50/50 10w flourescent bulbs, there are 2 of them. could it be these bulbs?

my tank has only 15lbs of live rock, no inhabitants. but i when i shut the light i noticed these tiny whitish fast moving "bugs" zip in and out of pin sized holes in the rock, what are these? can they handle this high heat? or will my live rock and its goodies suffer?

 

[wwildcats04]

My tank is heated by my powerhead and so is my friends... I say you should ditch the lights you have and go with the 20watt screw ins.

 

[vaderbanger]

yep its the lights. i took off the lights and hood and the temp now is a normal 77 degrees this morning. crappy lights lol
im gonna try the pc satellite 2x40w daylight and acnic with fan and hopefully this wont cause a massive amount of heat, ill have it elevated with the legs.
how do people manage these lights with no cover? dont fish jump all over the place and land on the floor? can a brittle starfish wander away too?
:sad:

 

[reefrash]

It could be the hood trapping the heat don't blame the bulbs. Incandecent lights produce more heat per watt than flo. That's how your french fries stay hot, plus the spectrum they produce is not suited for most tanks. Powerheads do produce a lot of heat and that is one of the reason that on larger tanks people use closed loops for circulation.