210 Reef in a condo

[shrimpchips]

+1 on insurance - the first thing I did before pulling the trigger on my 100 was call the insurance agent and find out what the policy was.

As for humidity, you probably won't have a problem. Most condos have a decent amount of circulation of air from the outside of the unit to the inside (unless you've sealed the unit real good), so you won't get much of a build up. In our unit (~600 sqft), the humidity is just fine with the tanks all going.