I am getting close to ordering a heater, finally! My Pool will be above ground and either 24' round intex ultra or 15 x 30 "permanent" AG. I will also be buying a new cartridge filter and pump, but haven't decided on those either as yet. Once I get the heater figured out, and the water lines run under the soon to be poured new patio, I'll focus on pump and filter. Option 1. Take FREE 200,000 btu used heater my brother got from an acquaintance in KC. My understanding is it was on an IG and the people were not remotelybversed in BBB? Bro thiks they had cruddy water and it fried the heat exchanger....

Comments: 1
Nothing more than 25 watts.
Your betta will welcome the heater as well -these should have water temperatures between 76-86oF.
You want to get a heater that's 5 watts for each gallon of water unless you'll need to raise the water temperature more than 10 degrees over the room temperature at any point during the year. Then you'd want to go to the next largest wattage.