🚀 go-pugleaf

> That's a good question. I have a 40gal[M]. with a 100watt, that's 2.5
> and it keeps the temperature pretty stable...
> 
> but oddly enough I have a 100watt in my 26gal. reef. It seems to 
> a harder time keeping the temperature at a steady level.
> 
> So I think the 2.5 is really a minimum rating depending on other variables.
> i.e. house temperature where it's located in the house.. My reef is on a tile
> floor right near the front door. So it gets a lot colder at night in that
> hallway vs. my Main tank which stays at a fairly level 79.

I'd say above all else, the thing that will help your heater keep the most
consistent tank temp. is good water circulation around the heater.

I run two Panguin 550 powerheads and a Dynaflow3 in my 20high tank (i.e.
PLEANTY of circulation) and the tamp. in my tank never goes above or below
81 degrees Farenheit.  (Except in the summer of course, when room temp. is
above 81 deg.:)
			-Matt