Heater size?

[Secondgen]

Can anyone tell me what size heater I need for a 90 gallon with a 20 gallon sump/refugium.

 

[SeanT]

I would use 2-3 heaters so if one fails you still have heat.
My rule of thumb is 3-5 watts of heating per gallon of water.
So in your case 300-500 total watss would do.

A stand alone controller like the ones sold at www.diyreef.com are greatly valued to prevent your heaters from malfunctioning.

hth,
Sean

 

[E-A-G-L-E-S]

does your tank's room temp. dip low at night? If so you'll need what SeanT said for every 5 degrees, i believe, above room temp. you want to keep tank temp.

 

[Craig Lambert]

I'll second the controller idea. When heaters fail they often times stay on rather than not work. A controller is cheap insurance to avoit cooking your tank.

 

[Secondgen]

Thanks for the advise. Would two 300 watt Theos be a good choice, or maybe the Visitherm? Any opinions?

 

[SeanT]

I like Finnex titanium.
Many have had luck with Ebo Jaegers.
I have never heard of Theos brand.