A swimming pool is one of the most treasured features in many South African homes. Whether it’s the centrepiece of a summer braai or a weekend sanctuary, it deserves careful attention. Unfortunately, pool problems often go unnoticed, until they’re too big to ignore.
From high water bills to cracked surfaces and murky water, here are the 7 most common warning signs that your pool may be in distress, plus practical fixes tailored to South African homeowners and pool professionals.
Cracks in the Pool Structure
Cracks in your pool’s walls or floor should never be taken lightly. While hairline surface cracks may appear from shrinkage or heat exposure, deep or widening cracks can compromise the structural integrity of the shell; especially in older concrete or gunite pools found across the Gauteng and Western Cape regions.
How to fix it:
For small cosmetic cracks, underwater sealants like Marbelite Repair Kits are available from South African suppliers. For deeper structural damage, pressure injection with polyurethane foam or epoxy resin is recommended. Companies such as Pool Doctor SA or Blue Lake Pools in Johannesburg offer structural assessments and crack repairs tailored to local pool designs.
Water Level Drops More Than Usual
Evaporation is normal, especially during dry Joburg or Bloemfontein summers. But if your pool loses more than 3 cm per week, it’s time to investigate. Undetected leaks can lead to soil erosion beneath the structure, and with SA’s water tariffs rising, this can cost you hundreds each month.
How to fix it:
Try the bucket test: place a bucket filled with pool water on a step, mark the water levels inside and outside the bucket, and check again in 24 hours. If the pool level drops more, it likely has a leak.
Specialised leak detection services in South Africa are offered by companies like Aqua-Net and Pool Leak Solutions which use sonar and pressure testing. Repairs might involve pipe replacements, resealing skimmer boxes, or resurfacing a leaky pool floor.
Discolored or Cloudy Pool Water
Murky water might seem like a simple chlorine issue, but it could also mean filter failure, metal leaching, or decaying pool finishes. In regions with hard water like Limpopo or the Karoo, calcium buildup is especially common and can cause lasting stains.
How to fix it:
Start with a comprehensive water test. Local suppliers like Just Chlorine SA and Builder’s Warehouse, stock kits that help monitor pH, chlorine, and total alkalinity. If chemical balance doesn’t solve the issue, inspect the filter. If necessary, consider an acid wash, which removes stains and restores brightness. Be warned: this should be done by a professional such as PoolSure or N&P Swimming Pools, especially in older pools with delicate plaster.
Malfunctioning Pool Equipment
Your pump, filter, and chlorinator form the heartbeat of your pool system. If the pump sounds like a grinding blender or the filter doesn’t push out clean water, you might be losing more than efficiency, and neglected equipment can shorten your pool’s lifespan.
How to fix it:
Start by checking for clogged skimmers, worn-out impellers, or dirty sand filters. If your equipment is over 7 years old, it’s likely time for an upgrade. Modern energy-efficient variable-speed pumps are now recommended globally, including in South Africa by Energy Efficient SA as they cut costs and reduce strain on the grid.
Local suppliers like The Pool Team offer replacement parts, pump installations, and chlorinator servicing throughout South Africa.
Broken or Loose Pool Tiles
Tile issues are very common in older South African pools, especially in areas with high rainfall or ground movement, like Durban or parts of Cape Town. Water can seep behind tiles and cause the adhesive to weaken, leading to peeling or mould growth.
How to fix it:
For small tile repairs, you can find waterproof adhesives and epoxy grout kits at stores like Pool Warehouse SA. Be sure to scrape off any old adhesive before applying new tiles, and reseal with a high-adhesion product suited for South African temperatures.
If the damage is widespread, consider a full retile. Local renovation experts such as Swemgat or Pool Renovators SA can help assess whether a complete retiling job is warranted.
Rough or Etched Pool Surfaces
If your pool walls feel gritty or your kids complain about scratches after swimming, your surface may be degrading. Etching and scaling occur when water chemistry is imbalanced, especially with high calcium content or acidic pH levels; a common issue in borehole-fed pools.
How to fix it:
Begin by testing and correcting chemical balance. South African water tends to be mineral-rich, so invest in a good-quality test kit from Chlorine Shop SA and aim to keep pH near 7.4 and calcium hardness between 200 to 400 ppm.
For minor scaling, an acid wash may be enough. In worse cases, re-marbeliting or fibreglass relining may be necessary, both services widely offered by providers like Ultimate Pools SA or N&P Swimming Pools.
Algae That Keeps Coming Back
If you’ve shocked your pool more than once and still see green streaks or black patches forming in the corners, the issue is likely deeper than just a lazy brush. South Africa’s warm climate creates the perfect conditions for algae to flourish; especially when circulation is poor.
How to fix it:
Use a strong algaecide like HTH’s Black Algae Killer and brush vigorously. Backwash and clean your filter thoroughly. If you’re using a sand filter, check if the media needs replacement (generally every 3 to 5 years).
If algae keeps returning, you may be dealing with biofilm or hidden cracks. In this case, it’s worth calling in a professional to assess whether resurfacing or regrouting is required. Many pool specialists offer resurfacing packages suited for stubborn algae infestations.
Final Thoughts
Owning a swimming pool generally comes with responsibility. Many early warning signs are subtle, but spotting them early can save you tens of thousands in repairs and water bills. From Bloemfontein to Ballito, proactive maintenance is key.
Here’s the truth: no pool stays perfect on its own. If your pump sounds strange, the water looks murky, or tiles keep falling off then it’s probably time to stop guessing and start fixing.
Call in a trusted local expert, stay on top of seasonal servicing, and treat small signs like they matter. Because in the world of pool care, they always do.
