Green Pool Rescue in Walnut Creek

A green pool usually means algae has taken hold because the chlorine level dropped too low to keep up. The Pump Master Pool & Spa clears green and cloudy pools for homeowners in Walnut Creek and nearby East Bay communities, then finds out why it happened so it doesn’t come back.

Why pools turn green

Algae spores constantly enter the water with wind, rain, leaves and swimmers. When free chlorine falls, which happens quickly in hot weather, after heavy use or a storm, or when circulation and filtration aren’t keeping up, an algae bloom can start within hours. Phosphates from leaves, pollen and fertilizer feed the algae and make it harder to control.

How we clear a green pool

We start by testing the water and checking the pump, filter and circulation, because a green pool often points to an equipment or filtration problem. We then shock the pool to raise free chlorine well above the combined chlorine level (breakpoint chlorination), brush the walls and floor, run the filtration system, clean the filter cartridges and remove debris. If phosphates are high, we treat them, and we finish by rebalancing pH, alkalinity and stabilizer.

Keeping it clear afterward

Once the water is clear, steady chlorine, good circulation and a clean filter keep algae from coming back. Weekly full-service maintenance takes care of all three, and a salt chlorine generator adds chlorine continuously so levels don’t crash between visits.

Green pool questions

How long does it take to clear a green pool?

It depends on how far the algae has progressed, the size of the pool and the condition of the filter. A light green tint can clear quickly, while a dark green pool takes longer and may need more than one treatment. We give you a timeline after we see the pool.

Is it safe to swim in a green pool?

No. Algae can harbor bacteria and make surfaces slippery, and cloudy water makes it hard to see the bottom of the pool. Wait until the water is clear and the chemistry is balanced.

Will shock alone fix a green pool?

Usually not. Shock kills algae, but the dead algae still has to be brushed, filtered and removed, and the filter usually needs cleaning afterward. If the cause is poor circulation or high phosphates, the pool can turn green again unless that is fixed too.

Service area and hours

We serve Walnut Creek, Alamo, Blackhawk, Clayton, Concord, Danville, Diablo, Dublin, Lafayette, Moraga, Orinda, Pleasant Hill, Pleasanton and San Ramon. Open Monday to Friday 8 AM to 5 PM and Saturday 8 AM to 5 PM.

Call or text (925) 579-1414 for a free consultation.