what size heater

[larrynews]

in my 90 reef what size heater would you use,i have never had a problem with the heat with the 2x400 mh but since we have moved and its cool in the basement, i think maybe i need a stronger heater, its on but it never get to the temp i want it at unless the mh are on...
thanks
larry

[ohioreef]

I'm thinking the recommendation is something like 5-7W per gallon. I'm using a 200W on my 75g and it does a good job of maintaining my temp.