MH's overheating tank

[cosmo]

Hi all,
I just added 3 250w mh's and the tank temp rising way too much. I had 2 160w actintics that raised the temp from 78 to 80 and I was ok with that. When the mh's go on the temp goes up more, at 82 I turn them off. My question is will 2 4" fans keep it cool enough for my mh's? I guess I'll have a lot of evaporation also, right? Any help would be great!!
cosmo

 

[mikegronholz]

2 4" fans,...nope. I recommend at least 2 per bulb !!! Make them ALL point in !!! The air will find its way out. This is all based on the normal 90-95 CFM I get with 110v fans. Normally the 12v fans will give less cfm !!!

 

[richard rendos]

Sounds like "Chiller Time" to me.

 

[pyro383]

mikegronholz
where did you get the fans, cost and what is their rated decibel level?