How long does it take to get the mineral ions up to the recommended levels?

The operating manual provides guidance on the settings for your pool or hot tub to minimize the mineral ion ramp up time.

The larger the pool, the longer it will take to ramp up the minerals.

The rule of thumb is 7-14 days for a pool and up to 7 days for a hot tub.

Once you get the ions up to the correct level, they are very stable, so you should not need to adjust the controller settings once you reach the recommended level of 0.2pmm to 0.4ppm.