I don't think you need a chiller if you can keep your temperature from going above 82 degrees. I used to run around 82-84 before i got my chiller. I now keep it at 80-81. HTH
How do you keep the temperture now at 80 degrees? Did you get a chiller? I have the ceiling fan on in the same room to see if it works but it doesn't. I just lost a cleaner shrimp and a Bicolor Pseudochromis. Before I get a chiller do you have any suggestions?
Try a small pc fan across the top of your tank or let it blow across the water in your sump. Also if you have a door or top on your canop try leaving it open.