I think I may be ready to bite the bullet and buy a pool heater, but I don’t know what would be best for our pool. It’s inground, 16x36, and gets sun from late morning to mid to late afternoon. I keep a solar blanket on it at night, but even with the temps this summer of upper 80s, it stays around 82-84 degrees at best. It rained last week, so now it’s back to 78-80. The previous owners said they had the pool ready for a heater, but I don’t know for what type of heater. My goal is to have the temperature be around 86 in the summer. Are heaters relatively easy to install if it’s set up for it, or does the pool store need to do it? I’ve attached pictures of what I think is for a heater. I’m assuming it’s for a heat pump and not gas.