For most Yuma homeowners, pool tile cleaning means dealing with the pale gray or white crust that collects along the waterline. It starts as a faint chalky film and, left alone for a season or two, can turn into a rough ridge that a brush barely touches. It is not dirt. It is minerals that the water leaves behind, and in Yuma there are plenty of them.
This page explains where the scale comes from, how the main removal methods compare, what keeps it from coming back, and when draining part of the pool is worth discussing. Routine brushing and vacuuming are covered on the pool cleaning page, and the weekly routine on the weekly pool service page.
Yuma Pool Cleaning Pro is a free phone line with no crew and no equipment. Dial (928) 615-5224 and an automated assistant asks what the tile looks like, then connects you with a pool business in the Yuma area that is locally owned and independent. That business looks at the scale, sets its own price, handles the cleaning and bills you itself.
Why Yuma pools get a white line on the tile
Hardness is a measure of the calcium and magnesium dissolved in water. The City of Yuma's Water FAQs describe the city's water as hard, at 18 to 22 grains per gallon, which is 310 to 380 milligrams per liter. That is the water most homes in the city use to fill and top off their pools.
Evaporation removes water but not minerals. Each time you add water to replace what the sun took, more calcium comes in, while the calcium already in the pool stays. Over months the level climbs. Along the tile, the water line moves up and down a little every day, so a thin layer dries onto the surface again and again. That layer is the white band.
Yuma's climate speeds this up. National Weather Service normals give Yuma about 118 days a year with a high of 100 degrees or more. The U.S. EPA's WaterSense program says an uncovered pool can lose 12,000 to 31,000 gallons a year to evaporation, depending on where it is, and that a cover can stop up to 95 percent of that loss. Less evaporation means less fresh calcium added with each top off.
Water chemistry plays a part too. The pool industry's trade group, the Pool and Hot Tub Alliance (PHTA), notes that because pool water carries a lot of carbonate, calcium carbonate is the scale most likely to form, and it says that high calcium hardness together with high alkalinity can lead to scale or cloudy water. Angi notes that calcium buildup is linked to pH running too high. Some chlorine products also add calcium: PHTA points out that calcium hypochlorite raises hardness as it is used.
Ways to remove calcium scale from pool tile
The right method depends on how heavy the scale is and what the tile is made of. Too much pressure or a harsh abrasive can scratch tile and glass, so the gentlest method that works is the place to start.
| Method | Best for | Who does it | Cautions |
|---|---|---|---|
| Soft brush during routine cleaning | New, thin film | Homeowner or pool service | Angi recommends soft bristles, since stiff bristles can scratch tile. |
| Tile cleaner made for pools, with a soft pad | Light, chalky deposits | Homeowner or pool service | Use only a product labeled for pool tile and follow the label. Never mix it with other chemicals. |
| Wet pumice stone | Light to moderate scale on tough tile | Homeowner, carefully, or pool service | Light pressure, test a hidden spot first. Can scratch glass or glossy glazed tile. |
| Soda blasting (baking soda media) | Moderate to heavy scale | Pool tile cleaning professional | Angi describes it as gentler than sandblasting and says it does not tend to scar or etch the surface. Ask how the company protects the water and the deck. |
| Other media blasting | Heavy, hardened scale | Pool tile cleaning professional | HomeGuide notes tile needs low blasting intensity to avoid cracking or chipping. Ask what media the company uses and if it is safe for your tile. |
| Acid treatments | Varies | Professional only | Pool acids are dangerous to handle and can damage grout and finishes. Leave acid work to a professional. |
No national cost guide checked for this page lists a price for pool tile calcium removal. A quote depends on the length of the tile band, how heavy the crust is and which method fits, so real quotes vary.
Slowing the scale down: water balance
Cleaning removes the crust you can see. Water balance decides how fast it comes back. Three readings matter most, and a home test kit or test strips can show all of them.
- pHA measure of how acidic or basic the water is. PHTA lists 7.2 to 7.8 as the acceptable range, with 7.4 to 7.6 as ideal. When pH climbs, calcium comes out of the water more easily.
- Total alkalinityThe water's ability to resist swings in pH. PHTA gives 60 to 180 parts per million as the acceptable range.
- Calcium hardnessThe amount of calcium dissolved in the pool water. PHTA lists 150 to 1,000 parts per million as permissible, with 200 to 400 as ideal.
A pool technician may also work out a number called the saturation index (often written LSI, for Langelier). It weighs pH, alkalinity, calcium, the water temperature and the dissolved solids together, and the result shows whether the water is more likely to deposit scale or to eat away at surfaces. PHTA recommends using the LSI to balance pool water. Because Yuma pool water is very warm for much of the year, it is worth asking a pool technician to check the balance as a whole and not just one number.
Pool chemicals are not something to experiment with. According to the CDC, combining different pool products is dangerous, and chlorine products combined with acid can release a toxic gas, so keep every product separate. Keep products in their original containers, closed, in a cool, dry, shaded place locked away from children and pets, and follow each label.
How often to brush the pool tile in Yuma
PHTA's maintenance advice is to brush walls weekly and to clean tile and grout every quarter. In Yuma it helps to run the brush along the tile line on the same weekly pass. New film is soft and comes off with little effort. Once it hardens over a few months, it takes a stone, a cleaner or blasting.
- Brush the tile line once a week, with a soft brush.
- Test the water each week and keep pH from drifting high.
- Put a cover on between swims to cut evaporation.
- Keep the water level steady, so the line does not move up and down the tile.
- Ask about tile cleaning before the scale turns rough and gray.
Winter visitors who leave Yuma for the summer often come back to a heavy line, because the hottest months are when evaporation and top offs are greatest. Arranging service while you are away keeps the tile from going a whole summer without a brush. The Yuma pool maintenance schedule lays out the year.
When draining part of the pool comes up
Over years, a pool can collect so much calcium and so many other dissolved minerals (together called total dissolved solids) that balancing the water gets hard. PHTA describes draining part of the water and refilling as the usual way to bring hardness down. A pool company can test the water and tell you whether it is needed. This is information only, so check the rules before any water leaves the yard.
Inside the City of Yuma
Call City of Yuma Utilities at 928-373-4500 first. The city's sewer code requires approval from the Director of Utilities for pool drainage to the sewer. The city's stormwater page asks residents to stop adding chlorine 48 hours before draining, run the hose into the private sewer cleanout on their own property, never a public manhole, drain slowly at low-use hours, and keep water out of the street.
In unincorporated Yuma County
In areas such as the Foothills and Gadsden, Yuma County's pool draining guide says chlorine must be at or below 1 part per million before release, saltwater pools may drain only to the sanitary sewer, and pool water may not be permanently connected to a storm drain or wash. Somerton, San Luis and Wellton residents should ask their own town.
Keep in mind that refilling with hard water brings calcium back in, so draining alone is not a cure. It works best together with steady water balance and regular brushing. For crack, leak or finish problems found during a tile cleaning, see the pool repair page.
Getting pool tile cleaning in Yuma through the free line
Describe the tile and the scale in your own words, and say whether you are in Yuma, the Foothills, Somerton, San Luis, Wellton or Gadsden.
- Call the numberAn automated assistant answers (928) 615-5224 at any hour, every day of the year.
- Describe the poolCloudy or green water, a pump making noise, crust on the tile, a heater that will not fire, and which part of the Yuma area you are in.
- Get put throughThe call goes to an independent, locally owned pool service company in the Yuma area, which hears a short summary before it picks up.
- Deal with them directlyThat company inspects, quotes, does the work and bills you. If it misses the call, your name, number, area and pool problem are passed on for a call back.
Before blasting or acid work begins, find out what method the company plans for your tile and what license it carries.
Check the contractor license. Arizona's Registrar of Contractors (ROC) issues the licenses for pool work. Residential R-6, Swimming Pool Service and Repair, is the classification for servicing a home pool and handling minor repairs. Building a new pool or putting in a whole new plaster or pebble surface falls under construction classifications such as B-5. Routine cleaning on its own is a gray area the ROC has not written a clear rule on, so simply ask the company what it holds. Then type its ROC number into the ROC contractor search (new tab) to see if the license is current, what type it is and any recent complaints. Yuma Pool Cleaning Pro does not run this lookup for you.
About this line: Yuma Pool Cleaning Pro is a free phone line, not a pool company. It answers your call and connects you with an independent local pool service company, which inspects, quotes and does the work, and which you pay directly. Companies may pay a referral fee. Calling the line costs you nothing. See how the line works.