Spring pool startup in North Texas is four steps done in late February, before the water warms past 60 degrees. The steps are inspecting the equipment, cleaning the pool, balancing the chemistry in order, and preparing for pollen and storms.
The timing is what saves money: the same work is a calm afternoon in cold February water and a race against algae in April. There is nothing to open, either: our pools ran all winter, because that’s how a pool survives a North Texas freeze.
Why late February, and not April
Late February beats April because the water is still cold and the pollen hasn’t arrived. Below roughly 60 degrees algae is effectively dormant and chlorine is consumed slowly, and in North Texas the water usually crosses that line somewhere in March. The US Forest Service’s profile of the southern live oak notes that its “pollen is wind dispersed during the first 2 weeks in April,” a few weeks after that crossing. A pool that meets both with a loaded filter and a January pump schedule is feeding algae that has started reproducing. Most green pools we recover in April were fine in March and still on a January schedule.
The scheduling advantage few owners use
Most pool companies in the Metroplex fill their routes between mid-April and Memorial Day. If you want an equipment inspection, a filter service, or a new customer slot without waiting, February is the month it is easy to get and July is the month it isn’t.
Step one: the equipment, before anything else
Equipment comes first because chemistry corrections depend on circulation and filtration working. Fixing the water before the equipment means doing the same job twice.
The post-freeze inspection
A post-freeze inspection matters because even a mild winter here usually brings at least one hard night. Freeze damage is characteristically silent: a split opens, nothing leaks while the system sits at low pressure, and then the schedule goes up in spring and the leak appears. Walk the pad in daylight and look for wet concrete on a dry day, a hairline along a pipe, a cracked pump lid, or a weeping filter clamp band. Our post-freeze inspection guide covers what each symptom points to.
The filter
Tear the filter down and clean it properly now. A filter that starts March loaded spends the whole spring behind. Write down the pressure gauge reading with everything clean, because that number is your baseline for the rest of the year: roughly 8 to 10 psi above it means do it again.
Spring is also the moment to judge whether the filter media is finished rather than dirty. As a rule of thumb, sand runs 5 to 7 years, cartridges 3 to 5, and DE (diatomaceous earth) grids 5 to 10. Filter cleaning cost and frequency covers the difference between a clean and a replacement.
The pump and the schedule
Listen to the pump. A whine, a hot motor, or air swirling in the basket are all worth resolving before the season. Then raise the schedule from the winter four to six hours toward a full daily turnover, which on a variable speed pump means more hours at a low speed rather than fewer at a high one. The run time guide has the calculation.
Everything else
- Check the automatic cleaner covers the floor rather than one favorite corner, and replace worn wear parts now.
- If you have a heater, fire it once before you need it. Discovering a dead heater in October is a two-week wait.
- Check the salt cell for scale and inspect the plates. Cold water suppresses output, so a cell that appeared to underperform all winter may be fine.
- Check valves and actuators move fully, since a winter of disuse is when they stick halfway.
Step two: the physical clean
Clean the pool physically before testing, because debris and dust in the water will skew what you’re about to measure and consume the chemicals you’re about to add.
- Skim the surface, including the winter pollen film that forms as trees bud.
- Empty both baskets, which after a winter are usually full.
- Brush everything: walls, steps, behind the ladder, and the waterline tile in particular, since a winter of drifting pH is exactly how a calcium band gets established. See calcium scale on tile.
- Vacuum the floor properly, including the corners the cleaner misses.
- Clear leaves out of the skimmer weir and the pump pot.
Step three: the chemistry, in the right order
Test the water with a full panel rather than a strip: free chlorine, pH, total alkalinity, calcium hardness, and cyanuric acid (CYA), sold as stabilizer. The CDC minimum for free chlorine doubles to 2 ppm once cyanuric acid is in the water. Then correct in this order, because each step moves the ones after it.
| Step | Target | Why it comes here |
|---|---|---|
| 1. Total alkalinity | 80 to 120 ppm | It buffers pH, so correcting pH first means correcting it again |
| 2. pH | 7.4 to 7.6 | Chlorine effectiveness and scaling both depend on it |
| 3. Calcium hardness | 200 to 400 ppm | Climbs over time here, and dilution is the only lever |
| 4. Cyanuric acid | 30 to 50, or 60 to 80 on salt | Sets the chlorine target you’ll use all season |
| 5. Free chlorine | At least 7.5% of your CYA, or 5% on salt | Meaningless as a number until step 4 is known |
Free chlorine, step five, is the one people most often get wrong. Chlorine is judged against your stabilizer level rather than against an absolute, so a pool holding 3 ppm can be well sanitized or unprotected depending on a number many owners don’t test. Why chlorine reads fine and the pool goes green covers the ratio, and the chemistry guide covers all five targets.
Don’t run this plan on a green pool
A pool that is already green needs a recovery rather than a startup, a different job with a different sequence. Our green pool guide covers the recovery order, and what green pool recovery costs in DFW covers what you’re looking at if you hand it over.
Late winter is the water exchange window
Calcium hardness and cyanuric acid both climb over time, and replacing water is the practical way to lower either. February and early March is the right time: few people are swimming, evaporation is slow so the pool refills predictably, and the water is cold enough that chemistry is forgiving while you rebalance. Do it in staged partial exchanges rather than a full drain, because our clay soil can lift an empty shell.
Step four: the things that are only true in spring
Pollen
Oak pollen falls in sheets here, and it is organic load. It consumes chlorine, it sinks and feeds algae, and it clogs a filter faster than anything else in the year except leaf drop. Skim daily during the drop if you can, and expect to clean the filter again shortly after it ends.
The yellow film that shows up in March and April is usually pollen rather than mustard algae. Pollen floats and skims off, mustard clings to shaded walls and lifts in a cloud when you brush it. Telling the three algae types apart covers the test.
Storms
Thunderstorms and severe weather peak in spring here, according to the National Weather Service’s Dallas/Fort Worth climate narrative. Heavy rain dilutes chlorine and stabilizer, drops pH and alkalinity, and washes dust and organics into the water, so the pool comes out of a storm with less sanitizer and more to sanitize. Empty the baskets, brush, test, correct pH, then shock at dusk the same evening. Left three days, that becomes a green pool rather than a twenty-minute job.
The barrier
Ground movement over a wet winter regularly puts a gate out of alignment. Before the first swim, confirm every gate self-closes and self-latches from any position, that the latch is out of a small child’s reach, and that nothing climbable has been left beside the fence. What applies to your backyard covers the requirements, which for a private pool come from your city’s code rather than the state statute most articles cite.
The first swim
The first spring swim is in cold water, and clear water isn’t automatically safe water. Confirm chlorine against stabilizer and confirm the bottom drain covers are visible before anybody gets in. Is the water safe to swim in covers what to check.
If you would rather hand it over
Most expensive spring problems we get called about were cheap and preventable four weeks earlier, and few owners are looking at their pool in February. The month-by-month pool year puts this job in the context of the other eleven, and the March line is the one to read.
Spring startup is the most common single job we get asked for that isn’t weekly service, and it’s a good use of one visit. That visit is a one-time clean, a full chemistry correction, and an equipment inspection that catches freeze damage while it’s still a scheduled repair. Booked in February, all three are easy to arrange. Booked in May, most companies are full.
