I have a 90 Gallon with a 20 Gallon sump and pretty much just fried my 1/10th HP Prime Chiller. My temperature was at 84 when I got home from school tonight. I would fix it but it's going to continue to happen. It was constantly at work. I would trade this chiller for the larger one. Im sure it's just the probe line or something minor. It's only three months old. I'll obviously pay the difference for the larger chiller. Either way run me some prices. I will consider anything reasonably priced and am not expecting a trade, I want a chiller whether it's a trade or straight up purchase. Thanks guys.