yeah that's a problem in kansas summers. if you can keep it even now in the winter it'll be alright until april or so. you'll need to wire up some 4-6" fans in your canopy to come on with your lights in the morning and go off with them at night. it get's really bad if you live west of topeka or manhattan, i keep my aquariums in the basement or the a/c up high.
get an electronic thermostat to turn off the ac at night otherwise your heater will work overtime. it'll take awhile to figure out, but the basement option is the best if you have one.
btw, if you're in eastern ks, gotofishheadsdotorg for more advice. it's a local non-profit saltwater site.
i'm in lawrence, overland park and topeka regularly if you'd like for me to take a look at your setup. i work retail, so it'd depend on my schedule. i'm in every city at least once a week though.