Calcium in Swimming Pools
Remove calcium from pool without draining
No Draining, No Acid Washing, No Wasted Water!
20,000 Pools Transformed since 2013
You don’t have to drain your pool or acid wash the surface to remove hard calcium build-up. Our engineered treatments dissolve calcium carbonate, calcium hydroxide, and calcium nodules (lumps) at the source, then our long-lasting polymer scale inhibitor keeps it from coming back.
It’s safe to use on Pebblecrete, Quartzon, glass bead, tiled, and fibreglass surfaces.
Calcium Buildup usually looks like
- White hard film on the pool surface
- White lumps that keep growing
- White ‘icicles’ running down pool walls
- Fine cracks forming around raised spots
- Pool surface feels rough to touch
Why Calcium Nodules Keep Coming Back
Got calcium spots that keep coming back in the same spot, even after you’ve rubbed them away? Here’s why.
In new or recently renovated pools, air pockets can form behind the pebble finish. When these voids fill with water, calcium in the concrete begins to crystallise. As it grows, it’s slowly pushed out through the surface as ‘calcium nodules’. These often look like white icicles clinging to the pool walls.
More detailed information on nodules further down this page.
Got white calcium buildup on a fibreglass pool? See our dedicated page on calcium removal for fibreglass pools.
We remove calcium without acid washing
Acid washing is a very harsh and irreversible process. It eats away a thin layer of your pool’s finish, leaving your pool surface rough and uncomfortable for swimming. Many pool owners regret acid washing once they see and feel the permanent damage to their pool surface.
Our treatment is more effective than an acid wash because we remove calcium without damaging your pool’s surface, and our prevention formula stops it from coming back. Best of all, it costs a fraction of the price.
Calcium Removal Options
OPTION 1 Calcium Removal - DIY kit
- 1 Litre of powerful calcium prevention polymer
- 3.5 Kgs of calcium dissolving compound
- Phone support from us - even after you buy
- Simple step-by-step instructions included
- Pool does NOT need to be drained
- Kit is sent and tracked by Aramex couriers
- Kids are back in the pool in 7 days
Most Pools $245
OPTION 2 Calcium Removal – On Site Technician
- 1 Litre of our powerful calcium prevention formula
- 3.5 Kgs of our calcium dissolving compound
- On-site water test
- Pool does NOT need to be drained
- Kids are back in the pool in 7 days
- A technician may be an add-on for $170 once you have the DIY Kit
From $415
Calcium Remover Price List
| Water Volume | Kit Prices - Inc. GST & Delivery | What You Get |
|---|---|---|
| Up to 40,000 Litres | $245 | X 1 Bottle of SSE + 2 Bags of Calcium Compound |
| Up to 65,000 Litres | $295 | X 1 Bottle of SSE + 3 Bags of Calcium Compound |
| Up to 95,000 Litres | $345 | X 1 Bottle of SSE + 4 Bags of Calcium Compound |
| Up to 120,000 Litres | $395 | X 2 Bottles of SSE + 5 Bags of Calcium Compound |
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Calcium buildup will slowly destroy your pool
Calcium nodules have strong expansion power which means that as they grow, they leads to cracking and delamination of the pool surface. Our treatments remove calcium and work to prevent it from coming back.
The dangers of delay:
Surface Fractures – Growing deposits can “separate” or crack your pool finish.
Costly Repairs – Once the surface is lifted or fractured, simple cleaning is no longer an option.
Irreversible Damage – We regularly see beautiful pools ruined by widespread calcium destruction.
We can remove and stop the calcium growth. Proper treatments can dissolve these deposits before they fracture your pool surface.
5 Reasons why calcium forms in swimming pools
Calcium is one of the most common types of issues that we see in swimming pools. Here are the main reasons why calcium forms and what causes it.
Where is the calcium coming from?
Calcium Nodules From Delamination.
Nodules are usually 2–3mm wide and 3–12mm long and can appear like icicles growing out of or ‘dribbling’ down the walls or floor of your pool. This type of formation may indicate that a section of the pool surface has de-laminated (pushed out) from the main pool structure. Remember, if the calcium spot reappears in the same place after being rubbed off, surface delamination is the likely cause.High Calcium Hardness in pool water. When high calcium hardness causes calcium formation, it is usually in the form of a light covering (or blotchy areas) rather than spots. It will often look like swirl marks on the pool surface. This film will often visually highlight the imperfections on the surface. For example, our clients will often say that their pool looked great when it was first filled, but later on, they can now see swirl marks, ridges or trowel marks that have appeared later. This happens because calcium exacerbates the appearance of these issues.
High Calcium in Pool Surface materials. Most new pebble based pool surfaces now use high white cement to make the surface bright. White cement contains calcium hydroxide which contributes to the challenge of managing calcium. The pool surface is rich in calcium which increases calcium hardness and the pH of the pool water. These factors will usually lead to a thin layer of calcium formation over the pool surface.
Calcium added to pebble mix during application. Swimming pool surface applicators will often add calcium chloride to the interior mixture to accelerate the curing (drying) process. This helps the surface dry faster and helps stop the wet surface from ‘slumping’ or sliding down the walls during application. However, an excess of calcium can lead to bleed water entrapment and if the curing process happens too fast, the concrete is not able to reach its optimum strength.
Calcium silicate. One cause pool owners often assume, but which is rarely the real issue, is calcium silicate. With the exception of WA & SA, it is unlikely that there is enough silica within the source water to have any visible calcium silicate. For example, in Sydney water, there is less than 2 mg/L of silica in the city water supply. This is a very low number which is roughly equivalent to 1 cup in an entire swimming pool. So, the chances of it being visible are very low. (For reference, roughly 60 cups of calcium chloride is needed to bring a 40,000 litre pool to a calcium level of 250ppm).
For more in-depth scientific information about removing calcium from swimming pools call us.
Now let's Keep the calcium gone
Once the calcium is gone and your surface is clean, our sequestrating agent Scale & Stain Eliminator works hard to keep your pool surface clean and smooth. Pool water contains dissolved calcium so when water chemistry shifts, from high pH or heavy rain, calcium falls out of solution and bonds to the surface, causing scale and a dull, faded appearance.
In concrete and pebble pools, sequestration stops minerals from hardening into calcium scale, a rough, sandpaper-like crust on the surface.
Regardless of your pool surface type, consistent sequestration keeps your pool’s colour vibrant and smooth.
Frequently Asked Questions
Here are some of the most common questions we receive about our products. Please feel free to call us if you would like further information.
Do I have to drain my pool water to remove the calcium?
No. All of our treatments work with the water still in the pool. There is no draining, even after all the calcium has gone. The kit also includes a preventative to stop calcium from coming back.
How is your product different from store-bought calcium removers?
At our Strathfield, NSW manufacturing facility, we blend three active ingredients to create our powerful calcium remover. Most pool shop products rely on a single, weak liquid to remove hard calcium. These are mild prevention products, not actual removers of calcium. This is why in 2025, 8 out of 10 clients had already tried another calcium remover before using our product.
What types of pool surfaces can it used on?
The products work on almost every pool surface type (except small inflatable kids’ pools). It is effective on Pebblecrete Pools, Glass Pebble pools, Quartzon, Beadcrete, Marblesheen, Vinyl Liners, Fibreglass Pools, Epoxy Pools, Tiled Pools, Ecofinish, Painted Pools, and Natural Stone Surfaces. We have treated 20,000 pools since 2013.
