Mine BC29 stays at 79.0 with an added fan coming on if it goes above 79. I think everyone needs to calm down with the name calling and petty BS. How old are we people?
Or spend $8 on a small clip-on fan from Target and direct it at your sump . You'll get about a 2-3 degree drop in temp without a chiller. It was all I used to keep my tank cool when I ran halides. My controller kicked it on at 79. Or buy a chiller