Make Sure Your Swimming Pool Is Winter Ready

Whether you plan to keep your pool running over winter or close it down, a few careful steps now will save time, money and repairs in spring.

Quick checklist

• Deep clean & remove leaves/debris
• Test & balance pH, alkalinity and sanitiser
• Shock the pool and add a winter algaecide
• Lower water level (if closing) and drain plant equipment
• Fit a quality winter or safety cover and tension it

Step 1 — Clean the pool thoroughly

Remove leaves, twigs and any surface debris. Brush walls and floor to dislodge dirt and algae spores, then vacuum and backwash or clean your filter until water is clear. A clean pool is the simplest way to avoid winter problems.

Step 2 — Test & balance the water

1. Adjust pH to the ideal range (generally 7.2–7.6) and set total alkalinity to manufacturer guidance.
2. Shock the water with a full chlorine dose (PoolStore recommends raising free chlorine to a high level for distribution before winter products).
3. Add a long-life winter algaecide/winterising product to prevent algae growth while the pool is less active.

Distributing chemicals with the pump running for several hours helps them reach the whole pool volume before you reduce filtering or close down.

Step 3 — Decide: active winter management or full winterise

Two common approaches:

• Active winter management — keep the water in the pool, run filtration on a reduced timer (for example short, regular cycles) and perform occasional checks. This avoids refilling and is often eco-friendly and cost-effective in milder climates.
• Full winterise / close down — lower the water level (typically ~4–6″ / 100–150mm below the skimmer), drain pumps, filters and heaters, blow out pipework and fit a secure winter cover. This is usually chosen in locations where freezing and heavy snow are expected.

Step 4 — Protect plant room, pumps & filters

• Isolate and drain pumps, filters, heaters and chlorinators — use the drain plugs provided. Let the equipment dry before storing small removable parts indoors. :contentReference[oaicite:4]{index=4}
• Backwash sand/DE filters or clean cartridge filters; replace cartridges if worn.
• If you can’t remove all water from pipes, use a pool-safe antifreeze only in lines (never automotive antifreeze).

Step 5 — Fit & maintain a winter cover

Put on a winter debris or safety cover and tension it correctly — loose covers collect debris and allow water to pool. Check cover tension after the first few days and clear snow off regularly to avoid collapse or damage. Safety covers add protection against accidental access; standard winter covers do not. :contentReference[oaicite:5]{index=5}

Step 6 — Monitor through winter

Visit your pool every 2–6 weeks while it’s closed or on reduced servicing: skim debris off the cover, remove standing water from cover depressions, and check equipment and water level. If you keep the pool running, run filtration periodically (modern guidance suggests short cycles regularly rather than long continuous runs) to prevent stagnation and freezing risk.

Common winter issues & what to do

Green or cloudy water when you open the pool

Shock and treat with algaecide, clean or replace filters, and run filtration continuously until clarity returns. Test and rebalance chemicals before swimming.

Frozen equipment or cracked pipes

If freezing has damaged equipment, turn off power and call a qualified pool technician — avoid rapid heating attempts that can worsen cracks. Prevent by fully draining and blowing mains where severe frost is expected. :contentReference[oaicite:8]{index=8}

Recommended products & tools

• Multi-parameter test kit or digital tester
• Pool shock (unstabilised chlorine) and winter algaecide
• Filter cleaner / backwash equipment; replacement cartridges or media
• Quality winter or safety cover and cover pumps to remove standing water
• Air compressor or shop-vac (blow mode) for clearing pipework if winterising

Want help closing or maintaining your pool?

If you’d prefer a professional close-down or a winter maintenance package, Hot Tubs Staffordshire can arrange an on-site visit and handle chemical dosing, plant drain-down and safe cover installation for pools across the region.

— Hot Tubs Staffordshire