The EcoSmart SMART POOL 18 is meant for pools that can hold up to 10,000 gallons, according to the manufacturer's product description. It's an electric tankless heater that uses some pretty smart tech like self-modulating technology and flow sensors to optimize energy usage. Those features are nice because they help with reliability and the heater's lifespan.

You might want to know it can bring up pool temps pretty quickly, but it does need a lot of electrical juice—two 40-amp breakers to be precise. So, you'd likely want a certified electrician to handle the installation.

Our research says you should be aware of a few things. While the heater generally does its job well, some folks have had mixed experiences with energy use and component durability. There's talk of heating elements burning out, especially in pools with high chlorine levels or hard water.

Plus, the quality of customer support seems to vary, which could be a concern if you run into issues.

To keep this heater running smoothly, it's important to follow the installation and maintenance guidelines closely. This should help avoid problems and keep it working nicely long-term.

So if your pool is under that 10,000-gallon mark, this could be a good fit. Just make sure you get it set up right and keep an eye on the maintenance.