A North Texas pool gets through leaf season on frequency, with baskets emptied every day or two and the pump schedule kept long until the drop ends. Net leaves before they sink, and test twice a week rather than once, for the four weeks or so it takes most of the neighborhood’s leaves to come down.
The frequency matters because the drop lands while the water is still warm enough to grow algae. A warm October here ends in a cold front, the leaves arrive in days rather than weeks, and a pool that gets its usual weekly attention through that stretch can be green by Thanksgiving.
Why a late drop is harder on a pool than an early one
Leaves come down in North Texas late, usually with the first serious cold front of October or early November. The National Weather Service’s Dallas/Fort Worth climate narrative notes that “the average freeze-free period runs from March to November,” which is most of the year, and trees here hold their leaves until a front pulls them down. Instead of six or eight weeks of gradual shedding, a large share of the year’s leaf load arrives over a handful of days, and a skimmer basket that took a week to fill in September fills in an afternoon.
That late drop lands in warm water. A pool in Ohio is cold by the time its leaves fall, and cold water is close to inert: nothing grows, chlorine demand is minimal, and a few leaves on the bottom are a cosmetic problem until spring. The pools on our routes in early November are often still in the 60s or low 70s, warm enough for algae to establish and for organic material to decompose quickly. Every leaf on the floor is a small, continuous demand on your sanitizer, which is why the classic North Texas November failure is a pool that went green while the owner was raking the yard.
| Day | What is happening | What you would notice |
|---|---|---|
| 1 to 2 | Skimmer and pump baskets fill | Weaker surface skimming, then reduced flow at the returns |
| 2 to 4 | Flow drops, filter pressure changes, chlorine demand climbs | Free chlorine falling faster than usual between tests |
| 3 to 7 | Leaves settle and begin to break down against the plaster | Tannin staining under the leaf pile, cloudy water |
| Week 2 | Sanitizer is consumed faster than it is added, algae establishes | Green or dull water despite adding chlorine |
| Any time | A packed basket starves the pump | A gravel-like noise at the pad, which is cavitation rather than a fault |
The cavitation row gets misread as a broken pump every year. The difference between a pump starved of water and a pump with a failing bearing is set out in what a loud pool pump is telling you, and in leaf season the answer is usually the basket.
The four-week routine
The leaf season routine is the same work as the rest of the year done more often, and the frequency is the point.
- Empty both baskets every day or two. Skimmer and pump. During the heaviest week, daily. This one habit prevents most of the rest of the list.
- Net the surface before you net the floor. A leaf floating is easy. A leaf on the bottom is waterlogged, stains, and has to be vacuumed. Ten minutes with a net on the day of a big drop saves an hour later.
- Keep the water level up. Leaf season overlaps with the point in the year when people stop topping off, and a low level plus a full basket is how a pump starts pulling air.
- Do not shorten the pump schedule yet. Cutting run time for the season is a November or December decision, and doing it in the middle of leaf drop removes filtration exactly when the pool needs the most. The run-time reasoning is in how long to run the pump.
- Test twice a week rather than once. Chlorine demand is unusually high and unusually variable during the drop, and a reading from last Sunday tells you little.
- Brush the waterline and the steps. Tannin lifts easily while it is fresh and reluctantly after a week.
- Watch the filter pressure. A rise of 8 to 10 psi over the clean baseline means it is time, and in leaf season that can arrive weeks earlier than usual. Write the clean pressure on the tank with a marker the day the filter is serviced, because the gauge is useless without it. Cleaning cost and intervals are in filter cleaning cost.
Skimmer socks help until they do not
A mesh sock over the skimmer basket catches fine debris and is useful in spring pollen season. During a heavy leaf drop it blinds over in hours, and a blinded sock is a closed valve. If you use one now, check it as often as you check the basket, and take it out entirely on the days the leaves are falling.
Tannin stains, and telling them apart
Tannin stains are the brown shadow leaves leave on plaster. Oak and pecan are the usual culprits here, and the stain can appear in under 48 hours on a warm pool. It is an organic stain, which means chlorine lifts it: brush the area, hold sanitizer at the top of its normal range for a day or two, and most of it goes.
Be sure the stain is organic before treating it, because a metal stain gets worse when you shock it. The one-minute test that separates them, a vitamin C tablet against the stain, is in rust and blue-green stains, and it is worth running before you add anything.
What is worth buying, and what is not
| Item | Verdict |
|---|---|
| A wide leaf rake, not a flat skimmer net | Worth it. A deep bag holds a drop’s worth instead of two passes’ worth. |
| A leaf canister in the vacuum line | Worth it if you vacuum manually. It stops the pump basket packing every three minutes. |
| A mesh leaf cover | Worth it on a pool under heavy canopy that will not be swum until spring. Awkward on a pool still in use. |
| A second skimmer basket | Cheap, and it means you empty rather than clean, which is the difference between doing it daily and not. |
| A robotic cleaner as the leaf answer | Not on its own. Bag capacity is the limit during a real drop, though it is useful the rest of the year. |
Which cleaner suits a pool under trees has its own post: robotic against suction against pressure cleaners.
The second leaf season few owners plan for
Live oaks give Plano, Frisco, and Allen a second leaf season, because they don’t drop in the fall. The US Forest Service’s species profile says the southern live oak “drops its leaves and grows new leaves within several weeks in the spring,” which here means late February and March, with the catkins close behind. A pool ringed with live oaks gets a second load when the water is warming, the pump schedule is still on winter hours, and few owners have thought about the pool since November.
That is a large part of why so many pools here look fine in January and turn in March. The month-by-month view of the whole cycle is in the North Texas pool year, and the recovery from it, if it gets away, is spring startup.
Closing out the season
When the drop finishes, do three things before you settle the pool into winter. Clean the filter properly rather than backwashing it, since a season of organic loading is exactly what a deep clean is for. Vacuum the floor completely, because anything left down there decomposes all winter. Then, and only then, set the run time for the cold months.
That last decision is not the same here as it is further north, because our mild winters have sharp cold snaps inside them. Both the run time and the freeze plan are covered in should the pool run all winter and freeze protection, and this is the month to read them rather than the night the front arrives.
Leaf season is also the clearest month of the year for the value of a scheduled visit, because the work is frequent, tedious, and dependent on somebody doing it on the day the wind blew. A pool that gets its baskets emptied and its chlorine checked twice in the worst week comes through unremarkably. On a pool under heavy canopy, the filter pressure that has been climbing since October also gets looked at rather than assumed. That is part of weekly service from now through the drop, and it is a great deal cheaper than the recovery that follows an unwatched November.
