According to the Pool & Hot Tub Alliance, 309K public and 10.4M residential pools exist nationwide. Because swimming is popular and there are so many pools, it’s important for US pool owners and operators to know how to best maintain them. Though there are many maintenance issues, learning how to remove calcium from pool tiles is particularly important.
Why Calcium is a Problem
Two types of calcium can cause problems with pools. Sometimes, deposits consist of a fine film that builds up in layers, leaving behind a residue that easily comes off tiles if cleaned regularly. This is called calcium carbonate. Sometimes, buildup results in sharp, crystalized, and sandy particles that attach to the tiles, caused by high calcium and pH levels in the water and requiring more intensive cleaning methods. This is calcium silicate.
Learning to remove calcium from pool tiles early can save time and money. Often called calcium scale, it worsens the longer it’s left. Ignoring it will cause damage not only to pools but to pool equipment as well. Regularly cleaning any scum lines – usually presenting as white or light gray deposits – will keep the buildup at bay and make pool tile scale removal easier. Sometimes, it just involves cleaning the deposits with a soft cloth. Since this is easier done in the pool, it’s a chore that keeps the cleaner cool on a hot day.
How Pool Tiles Differ
Pool tiles differ distinctly from building tiles. Two specific factors involve their resistance to sunlight and exposure to substances, including pool water and the chemicals it contains.
Exposure to Sunlight
Bathroom or kitchen tiles tend not to be exposed to sunlight for long periods, whereas outdoor swimming pool tiles are. For this reason, pool tiles are normally glazed. Because of this, they tend to resist fading, warping, or cracking due to sunlight exposure.
Exposure to Water & Chemicals
Though spills occur on indoor tiling, they are normally cleaned immediately. While liquid spills may cause grout on these tiles to break down, they won’t damage the tile. Swimming pool tiles, however, form a bond with the tile’s adhesive material. Further, they usually have water absorption rates of less than 0.5%. Swimming pool tiles must also resist erosion and pool chemicals.
How to Remove Calcium from Pool Tiles
Sometimes, the best way to remove calcium from pool tiles involves first contacting trusted pool professionals to check the chemistry of the pool’s water, as they can then advise the best technique to remove calcium from pool tiles. If a solid white or grayish crust forms along the waterline, determine what caused it with a pool water test. Typically, calcium remains in a solution, but cleaning it with a simple kitchen scouring pad along the water line when the residue hardens is usually good enough, though cleaning agents specific for tile and grout are also helpful. Regardless of the advice on removing calcium buildup, pool tile scale removal will always take at least a bit of physical labor.
Calcium Removers
What is the best calcium remover for pool tiles? Non-toxic calcium removers offer a method for removing pool tile scale that doesn’t affect a pool’s pH or damage the tiles. However, the water level must be reduced to access the tiles with calcium buildup. Use putty knives or scouring pads to remove the thickest crust, then apply the liquid calcium remover and soak it for several minutes.
When the calcium remover bubbles, the cleaning agent is doing its work. Use a scrubbing pad or brush to remove additional layers of calcium buildup on the tile. As calcium deposits come in layers, each layer requires further scrubbing. Once the calcium is scrubbed away, let the tile dry. Applying a sealer will protect against further buildup, though follow the instructions carefully.
TLC Surface Cleaner
TLC Surface Cleaner, a heavy-duty liquid cleaner for pool walls and surfaces, offers a new, thicker, no-run formula that clings longer to clean better. TLC removes grease, grime, caked-on oils, water line rings, and scale in one operation and restores the original sheen to fiberglass, acrylic, ceramic, vinyl, and pool surfaces. Its heavy liquid adheres readily to any surface and bubbles as it attacks dirt and grime. When TLC has stopped bubbling, it can be easily rinsed off.
Usage: Always wear rubber gloves when applying with a sponge, cloth, or soft brush. Allow 3 minutes while it bubbles, and then scrub briskly.
Muriatic Acid
Should other cleaning solutions not work, try a solution of muriatic acid mixed with water. Swimming pool stores carry muriatic acid. Take care and use gloves, however, as the acid can cause irritation or burns if it comes into contact with the skin or eyes.
Pumice Stones or Nylon Brush Cups
To remove caked calcium deposits from pool tiling or concrete, a pumice stone and a bit of hard work can do the trick. However, pumice stones should never be used on soft surfaces like pool linings. When working with stones, ensure they’re wet; otherwise, they may scratch the tiling.
Another similar method of pool tile scale removal uses a cordless drill and nylon bristle brush cup or wheel that can scrub buildup away. Never use steel cups or wheels, however, as this can cause rust to gather at the bottom of the pool or damage the pool’s tiling.
Pressure Washing
Also called bead blasting, this method will remove the most persistent blemishes or buildup from calcium deposits, and is perhaps the best way to remove calcium from pool tiles. Rent a pressure washer from a hardware store or, if worried about dislodging any loose tiles, hire a professional to do it. Professional pool companies use magnesium sulfate in compressors to remove calcium buildup quickly and efficiently. It involves much less work, though it will inevitably cost more.
Contact the Pool and Spa Professionals at Halogen Supply
If you need advice or help removing calcium from pool tiles, contact Halogen Supply today to speak with our support staff. With an average of over 20 years of experience in swimming pool maintenance, they can answer any questions you might have about swimming pools or spas and their upkeep.