Just had a pool installed? The first 30 days are critical — the curing plaster needs careful chemistry, the system needs to be balanced for the first time, and small mistakes now can leave permanent marks on the surface. Here’s the day-by-day plan to get from “pool’s done” to “safely swimmable, properly balanced, and ready for the season.”
Days 1–7: Plaster cure period (if you have a plaster pool)
Fresh plaster releases calcium hydroxide into the water for the first 7–14 days. The water will turn slightly cloudy, pH will spike high (often 9.0+), and tiny calcium dust will settle on the floor. This is normal.
- Brush the entire pool surface twice a day for the first week with a soft nylon brush (steel bristles can damage uncured plaster).
- Test pH twice daily and add muriatic acid or dry-acid pH reducer to bring it down toward 7.4–7.6.
- Don’t add chlorine until day 3–5; plaster contractors will guide you on timing.
- Don’t use a vacuum until day 14 — calcium dust will settle, then you can clean it.
Days 8–14: First chemistry pass
By the end of week 2, the plaster has stabilized enough for a real chemistry routine:
- Test all six parameters: free chlorine, pH, total alkalinity, calcium hardness, cyanuric acid (stabilizer), and salt (if applicable).
- Bring alkalinity into the 80–120 ppm range first (alkalinity stabilizes pH).
- Then adjust pH to 7.4–7.6.
- Bring calcium hardness to 200–400 ppm (most fresh pool water is below this).
- Add stabilizer to reach 30–50 ppm (60–80 for salt pools).
- Finally, add chlorine. Target 2–3 ppm free chlorine.
Doing this in order matters. Adjusting chlorine first when alkalinity is wrong is a waste of chemical.
Days 15–21: Equipment break-in
- Read your filter’s clean baseline pressure and write it on the housing.
- Confirm pump prime is solid (no air in strainer pot).
- Run a salt cell or chlorinator and verify chlorine output stays in target range.
- Set the pump timer / variable-speed schedule to 8–12 hours of runtime per day.
- Brush the entire pool once a week from here forward.
Days 22–30: Routine settling in
By day 30 you should be running a stable weekly maintenance routine: 2–3 chemistry tests per week, weekly brushing, basket cleaning, and a backwash or filter clean when pressure rises 8–10 PSI above baseline. If chemistry is still drifting wildly, something’s wrong — usually undiagnosed high cyanuric acid suppressing chlorine effectiveness, or stabilizer added before alkalinity was balanced.
The starter chemicals every new pool needs
Taylor K-2006 Test Kit
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Durachlor Total Alkalinity Increaser
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Durachlor pH Down Reducer
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Durachlor Chlorine Stabilizer
Shop NowReach out to PST Pool Supplies if you want a customized starter chemical package matched to your pool size and finish type — we’ll bundle exactly what you need for the first 30 days at a bundle price.