Trying again in N.C.

Hi everyone! A year ago I bought a wild caught seahorse before doing ANY kind of research. I bought a tank, cycled it, did the live sand, rock, macro algae, and added some soft corals over time. I brought her home a month and a half and all was well. Then I started my research. She was in a 40g breeder, eatting frozen as well as pods and shrimp I had delivered weekly. Then summer came to NC. She started getting sick. I bought all the meds recommended and treated her in QT. She would get better, then something else would go wrong. She finally died in the fall. Im assuming it was because I could not keep the water temp below 78. Sadly, I was like most new seahorse owners, saw her, had to have it, and when I realized I was over my head, it was too late. So after a year, my LFS bought seahorses from southwatch farms. I said never again because it was too painful, but I bought a pair anyway. They will be in a 36 bowfront, live sand, fake coral from instant reef. I have a biowheel and a HOB aqua C skimmer. The tank has been set up for two months and I hope to bring them home this weekend. Eatting frozen, but i have also put pods in. I moved the location of the tank to a cooler room and right now the temp is at 74 degrees. I am looking into a small chiller before the REAL heat sets in. Any and all suggestions would be appreciated. I have read everything I can get my hands on, and I want this pair to live alot longer than 9 months.