Introduction
With summer approaching, it's time to prepare your pool for the swimming season. Proper preparation ensures crystal-clear water from day one and prevents problems during the hottest months.
In Margem Sul, where summer can start early (April/May) and extend until October, this preparation is especially important. Well-prepared pools require less maintenance during peak season and provide a much more enjoyable swimming experience.
This guide offers a complete checklist for preparing your pool for summer, whether after hibernation or simply to ensure it's in ideal condition.
When to Start Preparation
Ideal Timing in Margem Sul
| Month | Action |
|---|
| March | Initial inspection, order products |
| Early April | Begin full preparation |
| Mid/Late April | Pool ready for occasional swimming |
| May | Regular swimming season |
Signs It's Time
| Indicator | Meaning |
|---|
| Air temperature consistently > 20°C | Water will start warming |
| Longer days | More sun exposure |
| End of winter rains | Stable conditions |
| Easter approaching | First swimming holiday |
💡 Dica Profissional
Start preparation 2-3 weeks before you want to use the pool. This gives time to resolve unexpected problems and for the water to fully stabilise.
Initial Inspection Checklist
Structure and Lining
- [ ] Check walls and floor for cracks
- [ ] Inspect joints and sealants
- [ ] Check tiles or liner (detachments, tears)
- [ ] Examine coping and edging
- [ ] Check ladders and handrails (rust, stability)
- [ ] Inspect drain covers
Technical Equipment
| Equipment | Verification |
|---|
| Pump | Operation, noises, leaks |
| Filter | Sand/cartridge/DE condition |
| Valves | Smooth movement, no leaks |
| Pipes | Cracks, loose connections |
| Skimmers | Baskets, covers, floats |
| Returns | Directional fittings, seals |
Electrical System
- [ ] Electrical panel (breakers, timers)
- [ ] Cables and connections (exposure, damage)
- [ ] Underwater lighting
- [ ] GFCI/RCD outlets
**WARNING**
Any electrical problems should be resolved by a qualified professional. The water-electricity combination is extremely dangerous.
Deep Cleaning
Winter Cover Removal
| Step | Procedure |
|---|
| 1 | Remove water and debris from cover top |
| 2 | Carefully release fixings |
| 3 | Fold accordion-style, don't drag |
| 4 | Wash with water and mild detergent |
| 5 | Dry completely in sun |
| 6 | Store in dry, dark location |
Pool Cleaning
| Area | Method |
|---|
| Walls | Brush with wall brush |
| Floor | Vacuum manually or with robot |
| Waterline | Specific product + sponge |
| Corners and stairs | Special attention, accumulates dirt |
| Skimmers | Clean baskets and interior |
| Drains | Check they're unobstructed |
Stain Treatment
| Stain Type | Treatment |
|---|
| Green (algae) | Shock treatment + algaecide |
| Brown (iron) | Metal sequestrant |
| White (limescite) | Anti-limescale product |
| Black (black algae) | Intensive specific treatment |
Filtration System
Filter Preparation
Sand Filter:
| Task | Procedure |
|---|
| Check sand | Replace if > 5 years or compacted |
| Deep backwash | 3-5 minutes until water clear |
| Check pressure gauge | Calibrate if needed |
| Inspect valve | Lubricate o-ring |
Cartridge Filter:
| Task | Procedure |
|---|
| Remove cartridge | Inspect condition |
| Wash | Water jet + chemical soak |
| Check pleats | Replace if damaged |
| Reinstall | Ensure proper seal |
Circulation Pump
| Check | Action |
|---|
| Pre-filter | Clean basket |
| Lid | Check o-ring (replace if dry) |
| Lubricate | O-ring with petroleum jelly |
| Purge air | After filling |
| Test | Check flow and noises |
💡 Dica Profissional
Lubricate all o-rings with petroleum jelly or silicone lubricant. Never use petroleum-based products on rubber/plastic components.
Water Treatment
Water Level
| Situation | Action |
|---|
| Below skimmer | Fill to mid-skimmer |
| Very low | May indicate leak - investigate |
| After hibernation | Normal to be low - fill |
Initial Analysis
| Parameter | Ideal Value | Test First |
|---|
| pH | 7.2 - 7.6 | Yes - affects everything |
| Free chlorine | 1.0 - 3.0 ppm | After adjusting pH |
| Alkalinity | 80 - 120 ppm | Yes |
| Calcium hardness | 200 - 400 ppm | Yes |
| Cyanuric acid | 30 - 50 ppm | If using stabilised chlorine |
Treatment Sequence
| Order | Action | Wait Time |
|---|
| 1 | Adjust alkalinity | 6 hours |
| 2 | Adjust pH | 4 hours |
| 3 | Shock treatment | 8-12 hours (overnight) |
| 4 | Add algaecide | After chlorine drops |
| 5 | Adjust hardness (if needed) | 24 hours |
| 6 | Check and adjust chlorine | Daily |
Initial Shock Treatment
| Water Type | Shock Chlorine Dose |
|---|
| Clean water (post-hibernation) | 10-15 g/m³ |
| Light green water | 20-25 g/m³ |
| Dark green water | 30-40 g/m³ |
| Black water | 40-50 g/m³ + flocculant |
Auxiliary Equipment
Heat Pump
| Task | Procedure |
|---|
| Visual inspection | Check winter damage |
| Clean evaporator | Soft brush + low pressure jet |
| Check connections | Electrical and hydraulic |
| Open valves | Ensure circulation |
| Turn on | Monitor first cycle |
Cleaning Robot
| Check | Action |
|---|
| Filters/bags | Clean or replace |
| Brushes | Check wear |
| Cables | Check damage, twists |
| Test | Supervised complete cycle |
Thermal/Solar Cover
| Task | Procedure |
|---|
| Remove from storage | Unroll carefully |
| Inspect | Check holes, wear |
| Clean | Water + mild detergent |
| Test | Place on water, check flotation |
Necessary Chemicals
Recommended Initial Stock
| Product | Quantity (50m³ pool) | Use |
|---|
| Shock chlorine | 2-3 kg | Initial treatment |
| Stabilised chlorine | 5 kg | Summer maintenance |
| pH- (reducer) | 3-5 kg | Common in Margem Sul |
| pH+ (increaser) | 1-2 kg | Backup |
| Algaecide | 2-3 L | Prevention |
| Flocculant | 1 L | Clarification |
| Metal sequestrant | 1 L | If well water |
Expiry Check
| Product | Typical Shelf Life | Degradation Sign |
|---|
| Granular chlorine | 2-3 years | Weak smell, colour change |
| Liquid chlorine | 6 months | Loss of effectiveness |
| pH-/pH+ | 2-3 years | Crystallisation |
| Algaecide | 2-3 years | Phase separation |
💡 Dica Profissional
Buy fresh products for the start of the season. Chlorine stored since last year may have lost 20-30% of its effectiveness.
Accessories and Safety
Check Accessories
- [ ] Ladder - stability, corrosion, non-slip
- [ ] Handrails - secure fixing
- [ ] Diving board (if present) - springs, surface
- [ ] Marker buoys
- [ ] Thermometer - calibration
Safety Equipment
| Item | Check |
|---|
| Life buoy | Condition, rope |
| Rescue pole | Integrity |
| First aid kit | Contents, expiry dates |
| Phone accessible | Emergencies |
| Rules posted | Legibility |
Fencing and Barriers
- [ ] Fence intact (no holes)
- [ ] Gate with self-closing mechanism
- [ ] Pool alarm (if present)
- [ ] Safety cover functional
Final Checklist
One Week Before Use
- [ ] Crystal-clear, balanced water
- [ ] Filtration running 8-12h/day
- [ ] pH stable for 3+ days
- [ ] Chlorine between 1-3 ppm
- [ ] No traces of algae
- [ ] Equipment tested
- [ ] Accessories installed
On Opening Day
- [ ] Test water (pH and chlorine)
- [ ] Check temperature
- [ ] Clean skimmers
- [ ] Check water level
- [ ] Prepare maintenance products
- [ ] Verify safety
First 2 Weeks
| Frequency | Task |
|---|
| Daily | Test pH and chlorine, clean surface |
| Every 2 days | Check filter, clean skimmers |
| Weekly | Vacuum, brush walls |
Common Opening Problems
Green Water
| Cause | Solution |
|---|
| Winter algae | Super-chlorination + algaecide |
| Inefficient filter | Check/replace filter media |
| Uncontrolled pH | Balance before treating |
Cloudy Water
| Cause | Solution |
|---|
| Suspended particles | Flocculant + vacuum |
| Insufficient filtration | Increase pump hours |
| Low chlorine | Shock treatment |
Persistent Stains
| Type | Treatment |
|---|
| Limescale | Lower pH to 7.0 + specific product |
| Metals | Sequestrant + continuous filtration |
| Encrusted algae | Brush + direct chlorine + patience |
Preparation Timeline
Week 1
| Day | Tasks |
|---|
| 1-2 | Inspection, cover removal, rough cleaning |
| 3-4 | Filter prep, equipment check |
| 5-7 | Fill, start system, first water analysis |
Week 2
| Day | Tasks |
|---|
| 1-2 | Balance alkalinity and pH |
| 3-4 | Shock treatment, 24h filtration |
| 5-6 | Fine adjustments, final cleaning |
| 7 | Final check, pool ready |
Summer Maintenance
Established Weekly Routine
| Day | Task |
|---|
| Monday | Full analysis, adjustments |
| Wednesday | Quick check, clean skimmers |
| Friday | Vacuum, brush walls |
| Sunday | Backwash if needed |
Adjustments for Heavy Use
| Situation | Action |
|---|
| Many swimmers | Increase chlorine preventively |
| Parties/events | Shock treatment after |
| Heatwaves | Check chlorine 2x/day |
| After storm | Analysis and treatment |
Frequently Asked Questions
How long does it take to prepare the pool?
Typically 1-2 weeks from start to ready for swimming. If the water is in good condition after hibernation, it can be faster. If very green or dirty, it may take up to 3 weeks.
Can I use the pool during preparation?
Not recommended, especially after shock treatments. Wait until chlorine is below 3 ppm and pH is stabilised. Usually 24-48 hours after the last intensive treatment.
Can last year's water be reused?
Yes, as long as it's not extremely degraded. It's more economical and ecological to treat existing water than to drain and refill. Only in extreme cases (black water, strong smell) is draining justified.
Do I need to call a professional?
For most pools, preparation can be done by the owner. A professional is recommended if: there are electrical problems, suspected leaks, damaged equipment, or if the water doesn't respond to treatment after 2 weeks.
How do I know if the filter sand needs replacing?
Replace if: it's more than 5-7 years old, channelling occurs (cloudy water despite backwashing), pressure gauge doesn't drop after backwash, or if sand is coming out through returns.
Conclusion
Preparing the pool for summer is a time investment that pays off enormously:
- Crystal-clear water from day one
- Fewer problems during the season
- Savings on products and emergency repairs
- Safety for the whole family
- Enjoyment of a worry-free summer
Follow this checklist methodically and your pool will be ready for months of fun in Margem Sul.
If you need professional help preparing your pool for summer in Margem Sul, ManutençãoPiscinas is here to help. Contact us for a no-obligation quote.
