Did it bit of searching and I’m trying to find a good thread on here for heater recommendations. I’ve got about a 23,000 gallon gunite/plaster pool in Kansas City and my Pentair ETI 400 has been nothing but trouble the last couple years. It’s only 6 1/2 years old. When it works it’s spectacular but that hasn’t been frequently enough. I’ve spent about $1000 on it in the last two years servicing it. It was about $5k new and they are probably twice that now. I definitely like the high-efficiency and the fact that it could increase the temp of my pool by 2° an hour. When it worked. But I’m willing to be more patient if I can get a more reliable one with slightly less efficiency. I guess I’m not really willing to sacrifice a lot of efficiency since pools already are so terrible for the environment and the natural gas it uses makes it worse. Appreciate any suggestions.