Chuck the tent and build a proper Grow closet. Get yourself a DIY co2 kit and get your ventilation straight! There are such thing as evaporative coolers but they're cheap, high maintenance and usually useless though. 80-85 degrees farenheight is edging on too hot. But with co2 supplementation, 85 becomes a growable environment. TS, Guy and tats all have good advice I hope you're able to get that heat under control. Idk where on earth you are, but in my half of the world it's getting cooler .