Pool Monitor Card

Pool Monitor Card is a dashboard card that shows swimming pool water readings as color-coded bars. Each sensor has a preset ideal range, so a bar can be drawn from little more than an entity ID, and any value can be overridden. The presets cover water chemistry, treatment and sanitization, and equipment such as filter pressure. Several sensors of the same type can be shown together, for example to compare pool and spa temperature. A sensor with no scale gets a warning in place of a bar, while the rest of the card keeps working. Some entities must first be built in Home Assistant, and template sensor recipes are provided for that. It is installed through the Marketplace or HACS, or by adding the script file manually.