If you cant keep reservoir temps down below 70F I wouldnt even attempt, very important to keep rootzone cold, would never have to rinse off roots. Aeroponics is difficult and pricey to do it right, but when done right its faster, more efficient(less nutrients) and higest quality. I have a 10X5 sealed closet with 1-1000w liquid cooled HPS on a light mover, where I grow 40 plants at a time. I have my reservoir in a seperate room that is airconditioned where nutrient reservoir temps stay between 62-68*F. I use 10 gallons for 40 plants per week! I use house and garden vann de zwaan nutes and a few others. heres a pic of clones that are only 3 weeks old and what healthy aeroponic roots should look like. I have not seen any browning of my roots since adding heavier nutrients either. I would say do your homework and get your climate control perfect before attempting. Aeroponics are very touchy and will let you know theres a problem right away. You found the best forums on the internet for aeroponics on rollitup.org, that I know of.