Evaperation!!!

[fooman]

Okay let me start buy saying that i am building a 150 gallon salty and it is my first one. Okay now to the question that i have is the only reason that people don't put lids on there aquariums is to keep the tank temp cooler ? I will be having my tank set up in my basement next to my 400 gallon which i have no problem keeping at a constant 80 degrees .So i was hoping that i can have a lid on my saltwater tank to keep the humidity down in the house . Any input would be appreciated.


Thanks!!