https://poolean.com/blog/ Plain-English guides to pool water chemistry, lifeguard staffing and pool logs. en https://poolean.com/blog/cloudy-commercial-pool-water https://poolean.com/blog/cloudy-commercial-pool-water Check if you can see the main drain, test chlorine and pH, check the filter pump, and know when the MAHC says to close a cloudy pool. Water chemistry Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/commercial-pool-chlorine-range https://poolean.com/blog/commercial-pool-chlorine-range The CDC model code's free chlorine minimums, the label and closure limits above them, and how to write a chlorine range sheet for each pool. Water chemistry Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/commercial-pool-ph-range https://poolean.com/blog/commercial-pool-ph-range The pH range in CDC's model pool code, the pH levels it treats as closure triggers, and how to record pH and follow up at your own site. Water chemistry Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/combined-chlorine-commercial-pool https://poolean.com/blog/combined-chlorine-commercial-pool Learn what combined chlorine is, how to calculate it, the 0.4 ppm action level in CDC guidance, and what to record and who to call. Water chemistry Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/how-often-test-commercial-pool-water https://poolean.com/blog/how-often-test-commercial-pool-water See the CDC's pool testing intervals (before opening, every 2 or 4 hours, weekly, monthly) and build a schedule that fits your local code. Water chemistry Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-chemical-usage-forecasting https://poolean.com/blog/pool-chemical-usage-forecasting Estimate each pool's chemical use from your records, work out days of supply, and set an order date without guessing at doses. Water chemistry Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-out-of-range-alerts https://poolean.com/blog/pool-out-of-range-alerts Learn what an early chlorine warning means, how to check current water conditions, and what to record when staff respond. Water chemistry Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/how-many-lifeguards-needed https://poolean.com/blog/how-many-lifeguards-needed How CDC's model pool code sets lifeguard numbers by zones, rotations and supervisors, plus a worked example to check against your local code. Lifeguards and staffing Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/lifeguard-call-out-procedure https://poolean.com/blog/lifeguard-call-out-procedure Set a clear lifeguard call-out process for manager notification, qualified replacements, coverage checks, and unresolved shifts. Lifeguards and staffing Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/track-lifeguard-certifications https://poolean.com/blog/track-lifeguard-certifications Build a lifeguard certification tracking spreadsheet with verified records, expiry dates, renewal steps, and clear manager checks. Lifeguards and staffing Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/lifeguard-chair-placement-3d-pool-model https://poolean.com/blog/lifeguard-chair-placement-3d-pool-model How to check lifeguard chair positions for full zone views, 20-second reach and glare, and how a 3D pool model helps you prepare. Lifeguards and staffing Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/lifeguard-staffing-forecast-weather https://poolean.com/blog/lifeguard-staffing-forecast-weather Use weather, holidays and past counts to estimate hourly crowds, then staff every zone with rotations, breaks and backup. Lifeguards and staffing Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/lifeguard-schedule-template https://poolean.com/blog/lifeguard-schedule-template Build a weekly lifeguard schedule around pool hours, staff qualifications, breaks, coverage needs, and approved changes. Lifeguards and staffing Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/commercial-pool-season-opening-checklist https://poolean.com/blog/commercial-pool-season-opening-checklist A seasonal pool opening checklist: health department approval, equipment, test kits, chemicals, staff papers, first water tests and records. Pool operations Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/daily-pool-opening-checklist https://poolean.com/blog/daily-pool-opening-checklist A daily commercial pool opening checklist: staff, before-opening water tests, the site walk, and when the pool must stay closed. Pool operations Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-reopening-checklist https://poolean.com/blog/pool-reopening-checklist What to check before reopening a pool after a closure for poop, lightning, chemistry or equipment, and what to record. Pool operations Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-supervisor-site-visit-checklist https://poolean.com/blog/pool-supervisor-site-visit-checklist Learn what to review during a pool supervisor visit and how to record concerns, staff feedback, and follow-up work. Pool operations Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/commercial-pool-preventive-maintenance https://poolean.com/blog/commercial-pool-preventive-maintenance Build a pool maintenance schedule from equipment manuals, the CDC's model code, local rules, service history, and clear task owners. Maintenance Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-water-loss-leak-detection https://poolean.com/blog/pool-water-loss-leak-detection How EPA's bucket test compares evaporation with a leak, what to record, warning signs of a leak, and when to call a leak professional. Maintenance Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-lightning-closure-policy https://poolean.com/blog/pool-lightning-closure-policy Use National Weather Service guidance and the CDC's model code to plan pool storm closures, shelter, staff roles, records, and reopening. Safety Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-fecal-incident-response-records https://poolean.com/blog/pool-fecal-incident-response-records A field-by-field fecal incident log based on CDC's Water Contamination Response Log, plus what to record before a pool reopens. Safety Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-water-test-log-template https://poolean.com/blog/pool-water-test-log-template A ready-to-copy pool water test log template with the fields the CDC model code lists, plus rules for test times, blanks and corrections. Records and logs Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-health-inspection-preparation https://poolean.com/blog/pool-health-inspection-preparation A records checklist for pool health inspections, built from the CDC model code: permits, water logs, certificates, incident logs and earlier findings. Records and logs Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/nyc-pool-inspection-data https://poolean.com/blog/nyc-pool-inspection-data See how often NYC routine pool inspections recorded violations, how indoor and outdoor results differed, and what the counts cannot tell us. Records and logs Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/paper-vs-digital-pool-logs https://poolean.com/blog/paper-vs-digital-pool-logs Compare paper and digital pool logs on required fields, corrections, access, work without a signal, retention and exports, with a test you can run. Records and logs Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-health-inspection-risk https://poolean.com/blog/pool-health-inspection-risk Rank your pools before inspections using CDC's model inspection form: current hazards, record gaps, past findings and open repairs. Records and logs Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/choose-pool-management-software https://poolean.com/blog/choose-pool-management-software Compare pool software through practical questions about water records, staffing, maintenance, access, offline work, exports, and pricing. Running a pool company Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/compare-pool-operating-costs https://poolean.com/blog/compare-pool-operating-costs Compare similar pools using clear records for chemical use, water loss, closures, staffing gaps, and costs over matching periods. Running a pool company Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/manage-multiple-pool-sites https://poolean.com/blog/manage-multiple-pool-sites A morning review for pool companies: what each site reports, which problems come first, and a template to track who owns each follow-up. Running a pool company Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-management-software-compared https://poolean.com/blog/pool-management-software-compared Compare spreadsheets, DigiQuatics, HydroApps, scheduling software, and Poolean on the jobs a commercial pool team does every day. Running a pool company Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-chemical-reorder-planning https://poolean.com/blog/pool-chemical-reorder-planning Use stock counts, daily use, delivery times, and a supply buffer to decide when each pool needs its next chemical order. Running a pool company Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/use-poolean-without-a-signal https://poolean.com/blog/use-poolean-without-a-signal Learn which records stay on your phone, how offline entries keep their times, and what to check when uploads resume. Using Poolean Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/switch-pool-records-to-poolean https://poolean.com/blog/switch-pool-records-to-poolean Learn how to prepare an export, review pool and equipment records, and confirm what can transfer before you switch. Using Poolean Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/log-water-tests-in-poolean https://poolean.com/blog/log-water-tests-in-poolean Record water readings and test photos from a phone, review flagged results, use early alerts, and match your logging to public testing guidance. Using Poolean Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/site-visits-and-tasks-in-poolean https://poolean.com/blog/site-visits-and-tasks-in-poolean Learn how pool visit records, guard photos, assigned tasks, and progress reviews support a clear supervisor handoff. Using Poolean Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/equipment-qr-nfc-lookup-in-poolean https://poolean.com/blog/equipment-qr-nfc-lookup-in-poolean How QR codes and NFC tags open equipment records, what works without a signal, and a tagging checklist based on CDC daily checks. Using Poolean Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/property-manager-view-in-poolean https://poolean.com/blog/property-manager-view-in-poolean What property managers and boards see in the read-only pool view, how to read logs and closures, and which questions to ask the operator. Using Poolean Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/breakpoint-chlorination-math-commercial-pools https://poolean.com/blog/breakpoint-chlorination-math-commercial-pools Size a breakpoint dose from the MAHC 10x rule, pool volume and product strength, and learn when water exchange or the air plan is the better fix. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/cya-free-chlorine-ratio-45-to-1-math https://poolean.com/blog/cya-free-chlorine-ratio-45-to-1-math Run the MAHC 45:1 CYA to free chlorine ratio as a daily number, see how trichlor feeds drift toward it, and work the drain-and-refill fraction. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/chemical-feeder-interlock-monthly-challenge-test https://poolean.com/blog/chemical-feeder-interlock-monthly-challenge-test How to run and log the MAHC monthly chemical feeder interlock challenge test, what to do on a fail, and a 30-pool calendar that catches missed tests. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/hyperchlorination-ct-math-cya-drain-table https://poolean.com/blog/hyperchlorination-ct-math-cya-drain-table How to get hyperchlorination hold times from the MAHC CT value, when CYA forces a drain, and how to pick 20, 30 or 40 ppm to reopen on time. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/langelier-saturation-index-worksheet-pools https://poolean.com/blog/langelier-saturation-index-worksheet-pools Work the MAHC Annex Langelier formula and factor table by hand, with an indoor and an outdoor example, a lever order and a 30-pool monthly sheet. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/lifeguard-in-service-training-plan-mahc-6-3-3-4 https://poolean.com/blog/lifeguard-in-service-training-plan-mahc-6-3-3-4 Build a lifeguard in-service plan around MAHC 6.3.3.4: the four record fields, the consecutive rescue demo, certificate rules and a 20-pool season plan. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/lifeguard-rotation-math-zones-relief-60-minute-rule https://poolean.com/blog/lifeguard-rotation-math-zones-relief-60-minute-rule Turn MAHC 6.3.3.1 into a rotation worksheet: zones, relief guards, minutes per station and handoff time that keep every guard under 60 minutes. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/monthly-pool-client-report-hoa-hotel https://poolean.com/blog/monthly-pool-client-report-hoa-hotel Build a one-page monthly pool report for HOA boards and hotels: exceptions first, then water replacement, chemistry and flow trends, closures and repairs. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/nyc-pool-inspections-by-month-indoor-outdoor https://poolean.com/blog/nyc-pool-inspections-by-month-indoor-outdoor NYC routine pool inspections by month, indoor versus outdoor, and re-inspection rates, with a readiness calendar and every caveat in the data. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-chemical-release-response-plan-hazmat https://poolean.com/blog/pool-chemical-release-response-plan-hazmat Build the MAHC accidental chemical release plan: five required procedures, HAZMAT decision points, weekly supply checks, storage rules and a drill sheet. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-records-audit-mahc-6-4-1-three-year-retention https://poolean.com/blog/pool-records-audit-mahc-6-4-1-three-year-retention Audit your pool records against MAHC 6.4.1: the 17 daily items, inspections, logs and 3-year retention, with a worksheet and a sample audit. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-supervisor-route-planning-visit-frequency-math https://poolean.com/blog/pool-supervisor-route-planning-visit-frequency-math Set supervisor visit frequency from code floors and risk tiers, check it against visits-per-day math, and rebuild the route when a supervisor is out. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-turnover-time-flow-rate-audit https://poolean.com/blog/pool-turnover-time-flow-rate-audit Turn flow-meter readings into turnover hours, check filter loading, read the MAHC bather-load method, and set a trend rule that flags falling flow early. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/pool-water-replacement-dilution-math https://poolean.com/blog/pool-water-replacement-dilution-math Turn daily attendance into the MAHC discharge volume, count backwash correctly, and use the dilution formula to predict CYA, TDS and calcium after a drain. For operators Wed, 21 Oct 2026 12:00:00 +0000 https://poolean.com/blog/qualified-operator-coverage-2-hour-rule-multi-site https://poolean.com/blog/qualified-operator-coverage-2-hour-rule-multi-site Classify each pool under MAHC 6.3.1 as onsite, within 2 hours or weekly contract, then size operators, drive time and visit records for 10, 30 or 60 pools. For operators Wed, 21 Oct 2026 12:00:00 +0000