Clearing Green Pools in Cypress, TX

What is on the floor decides the first visit

On the wooded side of US 290, a green pool often hides a mat of leaves on the bottom. That layer has to come out with a leaf net before chemistry starts, because decaying leaves soak up chlorine, can stain plaster, and will choke a vacuum line if you try to pull them through it.

On the open prairie side, the floor is more often coated in fine soil and grit blown or washed in. Particles that small pass straight through a dirty filter and cloud the water again, so where the plumbing allows, we vacuum that layer to waste instead of sending it to the filter.

Runoff from flat yards brings food for algae

Much of Cypress sits on nearly flat Clodine and Cyfair loams that drain slowly. When yard water reaches the pool, it carries soil, grass clippings and lawn fertilizer with it. Fertilizer adds phosphate, which helps algae come back, and the soil coats the filter and keeps the water hazy after the algae is dead.

A storm-green pool here gets a phosphate test and more filter cleanings than one that simply ran low on chlorine. If water also reached the equipment pad, safety comes first and the job starts as storm cleanup. While you wait for the first visit, these post-storm steps are safe for an owner to take.

Partial drains on slow-draining ground

When a summer of tablets has stacked stabilizer so high that no realistic shock dose can win, some of the old water has to go. In Cypress, timing that drain matters. Slow-draining soil can stay saturated for days after a wet week, so we lower the pool only partway and only during a dry stretch.

The refill then becomes part of the cleanup. Depending on your utility district, the hose may deliver well water, chloraminated lake water, or a mix, and each one moves the numbers differently. Lake water adds its own chlorine demand at the exact moment you are trying to get the pool to hold a reading overnight. So the refill is tested on its own and the final shock and balance are set to it, not to the water that left.

Spacing the visits from Sugar Land

Cypress is about 25 miles from our office, so a cleanup is planned as a series of scheduled visits rather than one long day. What happens between them matters as much as the visits. Keep the pump running around the clock while the water is green, empty the baskets daily, brush the walls once a day if you can, and keep swimmers and pets out.

Once chlorine holds from one evening to the next morning and the floor is clean, a fixed spot on our Cypress route through weekly pool service stops the next bloom before it starts.

Before the first cleanup visit

• Run the pump if it primes and holds water in the basket
• Dump the leaves out of both baskets so the pump is not starved
• Stop adding chlorine tablets, which raise stabilizer
• Note whether muddy runoff from the lawn poured over the pool edge
• Find your utility district's latest water report if you have it