Green Pool Recovery: A Solo Tech's Step-by-Step (And What to Tell the Customer)

Green pool calls come in two flavors: the regular stop you walked up to and the panic text from a customer the day before a pool party. Either way, the work is the same. Test, dose by gallons, get the filter moving, and tell the customer exactly what you did and when they can swim.

Here's a working playbook. Then a note on the customer update — the part most techs underdo.

Before you open a bag

Walk the equipment pad first.

Is the pump running? If a breaker is tripped or the timer is off, you've found half the problem already.
Filter pressure — high? Time to clean it.
Filter type. DE and sand get backwashed. Cartridges get pulled and hosed off (or soaked). Don't mix those up on the customer's invoice.
Look at the water. Light green / cloudy is one job. Dark green with no bottom visible is another. Black-green with debris is closer to a drain-and-clean conversation.

Test before you dose

No universal shock number. Anyone giving you a flat "X pounds per green pool" is guessing.

You need:

Gallons. Length × width × average depth × 7.5 for a rectangle. Estimate for freeform. If you service it weekly, you should already know.
Free chlorine, pH, total alkalinity, CYA, phosphates if you carry the kit.

CYA matters more than people admit on a recovery. High stabilizer means your free chlorine isn't doing what the test strip says it's doing. If CYA is pinned, you're looking at a partial drain before chemistry will hold.

Dose to the pool in front of you, not the pool in the manual.

Order of operations

Brush the walls and floor. Knock the algae loose so chlorine can reach it.
Adjust pH down if it's high. Chlorine works harder in the right pH window. Muriatic acid, dosed to volume.
Shock. Cal hypo or liquid chlorine, dose calculated against gallons and current FC. Spread it, don't dump it in one spot.
Algaecide if you use it. Some techs do, some skip it on a hard shock. Your call.
Run the pump. This is the part customers skip. The pump has to run long enough to turn the water over multiple times. If they're on a timer running 4 hours a day, that's the problem, not your chemistry.
Filter maintenance the next visit. Backwash the DE or sand once the dead algae loads it up. Recharge DE. If it's a cartridge, pull it and hose it.

Retest the next day or next visit. Adjust. Repeat if needed. Some greens come back in 24 hours. Some take a week.

What to tell the customer

This is where the job gets won or lost. Customers don't want a chemistry lecture. They want to know: is it fixed, when can I swim, what do I need to do.

Match the register of a normal after-service text. Flat. Concrete. Names what you did. Gives a time.

Hey [name]. Pool was green. Brushed, balanced pH, shocked it, added algaecide. Pump needs to run during the day — set it to 8 hours minimum or it'll come back. Swim ready in about 24 hours if water clears overnight. Will check it on the next stop.

Or when there's a cause they need to know about:

Pool was green because the pump breaker was tripped. Reset it, brushed, shocked. Keep an eye on that breaker. Swim ready by tomorrow afternoon.

No drama. No "thank god I got here in time." Just what you did, what they need to do, when the pool is usable.

If you carry before/after photos in the customer's file, attach one. That's the receipt.

Where PoolPilot fits

PoolPilot is built around the solo operator and the truck — one tech, one route, the work that actually happens between stops. Skimmer, Pool Brain, and Jobber serve a wider audience. We're focused on the person doing the service.

For a green pool recovery, that means logging what you dosed against the pool's gallons on the stop, attaching the photo, and sending the customer update from the same screen before you back out of the driveway. Stop notes carry to next visit so the recovery doesn't get lost when you come back to check it.

$30/mo. 14-day free trial. No contract.

The chemistry is yours. The customer update is the part that keeps the phone from ringing later.