North is taking an aquarium service call. The first useful line is tank gallons, the percent to change, and which system. Without that, the callback is a second interrogation and the customer has already called someone else.
A percent change is a volume, not a promise that the water is mixed. Salt, temperature, and the filter stay on the note.
The water change gallons turns the counts into gallons to pull. That figure is a planning total for the company that claims the job. It is not a permit, a lab result, or a price.
A local tech does the change and the tests. North does not dose the tank. Lite is $99 per month, 1 seat, on the company's own phones. North repeats the note and the address, then the local company calls back.
