Pool Reverse Osmosis
-
✔ No Drain Required
-
✔
Mobile Service – We Come to You
-
✔
Saves 85% of Your Water
-
✔
Serving San Diego &
Orange County →
High calcium, high TDS, or excessive CYA? Reverse osmosis (RO) removes dissolved buildup from your pool water so chemistry behaves again—without draining your pool.
RO is ideal when you see…
- ✓Calcium hardness creeping up (scale, cloudy water, rough tile line)
- ✓High TDS (“stale” water that won’t hold chlorine)
- ✓CYA too high (chlorine feels “locked”)
Reverse osmosis filters out dissolved buildup
Pool reverse osmosis is a mobile filtration process that pulls pool water through specialized membranes that remove dissolved solids. Instead of throwing away your water, we clean it.
- ✓Targets calcium hardness, high TDS, and excessive CYA
- ✓Helps pools balance easier and stay clearer
- ✓Less stress on plaster, salt cells, heaters, and filters
Send me your numbers
I’ll tell you if RO makes sense, and what we can realistically move in one service.
Tip: include pool gallons + “chlorine or saltwater.”
The RO process (simple + transparent)
Test + set targets
We measure your baseline and choose goals for calcium, TDS, and CYA based on your pool type.
Filter the water
Water is circulated through RO membranes to remove dissolved buildup and return cleaner water to the pool.
Balance + verify
We re-test and help guide final balancing so the pool is ready to maintain normally again.
Final balancing can vary by pool (salt vs chlorine, plaster condition, target LSI, etc.).
Typical results after pool reverse osmosis
Every pool is different, but here are common before/after ranges we see when treating high calcium, high TDS, and elevated CYA in San Diego pools. The goal is simple: water that balances easier and stays clear with normal maintenance.
| Water Factor | Common “Before” Range | Common “After” Target Range | Why It Matters |
|---|---|---|---|
| Calcium Hardness | 500–1,000+ ppm | 200–350 ppm | Reduces scaling pressure and helps protect tile, plaster, heaters, and salt cells. |
| Total Dissolved Solids (TDS) | 3,000–7,000+ ppm | 1,500–2,500 ppm* | Makes water feel “new” again and helps sanitizer behave more predictably. |
| Cyanuric Acid (CYA) | 80–200+ ppm | 30–60 ppm | Restores chlorine effectiveness and reduces the “chlorine locked” problem. |
What homeowners notice most
- ✓Clearer water with less “chasing” chemistry
- ✓Less scale and less strain on equipment
- ✓Chlorine works better once CYA is controlled
What to text for the best estimate
- ✓Pool gallons
- ✓Calcium, TDS, CYA (and Salt if applicable)
- ✓Chlorine or saltwater pool
A quick note on salt pools
RO targets dissolved buildup. After treatment, salt is adjusted back to your preferred operating level so your salt system runs correctly.
*TDS targets vary—salt pools naturally have higher TDS due to salinity.
Results vary based on starting chemistry, pool volume, and site conditions. We’ll set realistic targets after testing.
Recent San Diego pool reverse osmosis results
Below are anonymized real-world results from recent San Diego County reverse osmosis treatments. Each pool had elevated calcium, CYA, or TDS levels that made balancing difficult.
16,000 Gallon Residential Pool
| Parameter | Before | After |
|---|---|---|
| Calcium Hardness | 920 ppm | 250 ppm |
| CYA | 155 ppm | 50 ppm |
| TDS | 3,400 ppm | 850 ppm |
Heavy calcium and stabilizer buildup restored to balanced operating ranges.
Coastal High-TDS Pool
| Parameter | Before | After |
|---|---|---|
| TDS | 9,910 ppm | 1,795 ppm |
| Calcium Hardness | 980 ppm | 200 ppm |
| ORP | 548 mV | 740 mV |
Extreme dissolved solids reset. Sanitizer efficiency fully restored.
East County Chlorine Pool
| Parameter | Before | After |
|---|---|---|
| TDS | 4,550 ppm | 1,500 ppm |
| CYA | 120 ppm | 30 ppm |
| Calcium Hardness | 450 ppm | 200 ppm |
Chemistry reset and stabilized for easier ongoing maintenance.
Wondering what we can move in your pool?
Text your pool gallons + Calcium, TDS, and CYA levels and we’ll provide realistic target ranges.
Results vary depending on starting chemistry, pool size, and site conditions.
Reverse Osmosis vs Drain & Refill
In San Diego, high calcium and rising TDS are common. Most homeowners drain to reset water—but RO can often deliver the same “fresh water” result while keeping the pool full and reducing risk to plaster and equipment.
- ✓You want to avoid a large drain/refill
- ✓Calcium, CYA, or TDS are high and chemistry won’t cooperate
- ✓Concern about plaster exposure, hydrostatic pressure, or refilling delays
- ✓You want more stable water for salt cells, heaters, and filters
- ✓Major remodel, structural repair, or full surface work
- ✓Severe contamination (ex: flooding) where water must be discarded
- ✓Other site constraints that make RO impractical
| Category | Reverse Osmosis (RO) | Drain & Refill |
|---|---|---|
| Water use | Recycles your existing water and removes dissolved buildup | Discards pool water and replaces it with new fill water |
| Risk to plaster / shell | Pool stays full during the process | Can introduce risk depending on conditions and how long it’s empty |
| What it fixes | Targets calcium, CYA, high TDS and dissolved solids | Resets everything, but brings in local fill water chemistry |
| Convenience | Typically same-day for many pools | Time depends on drain rate, refill rate, and local restrictions |
Want a simple recommendation?
Text your pool gallons + Calcium, TDS, and CYA. I’ll tell you if RO makes sense and what results are realistic.
Note: If your pool is saltwater, we adjust salt after RO to your preferred operating level.
Common San Diego scenarios
High calcium / scale
Hard fill water and evaporation can push calcium up until you’re constantly fighting scale and cloudy water.
High stabilizer (CYA)
If CYA is excessive, chlorine becomes less effective and algae prevention gets harder without partial water replacement.
High TDS / “stale” water
Over time, dissolved solids build up from chemicals and environment. RO resets water quality without a full drain.
Pool reverse osmosis across San Diego
Based in North County San Diego and serving surrounding areas. If you’re outside these areas, reach out—RO routes can expand depending on demand.
North County
Oceanside • Carlsbad • Vista • San Marcos • Encinitas
Central SD
Clairemont • Mira Mesa • Carmel Valley • La Jolla (and nearby)
Inland
Poway • Rancho Bernardo • Escondido • Rancho Santa Fe
Pool reverse osmosis questions
Is pool RO safe for saltwater pools?
Yes. RO targets dissolved buildup (TDS, calcium, CYA). Salt is adjusted afterward to your preferred level.
How long does pool reverse osmosis take?
Most pools are completed the same day. Timing depends on pool size and how far we’re moving calcium/TDS/CYA.
Do I still need chemicals after RO?
Yes—RO is a reset. You’ll still maintain normal sanitizer and balance, but it’s typically easier once the buildup is removed.
Is RO better than draining and refilling?
In many cases, yes—especially when you want to avoid a large drain/refill, reduce risk to plaster, or conserve water.
What test results should I send you?
Pool gallons + Calcium Hardness, TDS, CYA, pH, alkalinity, and whether it’s chlorine or saltwater.
Ready for clean, controllable water?
Call or text and I’ll give you a straight answer on what RO can do for your pool.
Yes. RO targets dissolved buildup (TDS, calcium, CYA). Salt is adjusted afterward to your preferred level.
Most pools are completed the same day. Timing depends on pool size and how far we’re moving calcium/TDS/CYA
Yes—RO is a reset. You’ll still maintain normal sanitizer and balance, but it’s typically easier once the buildup is removed
In many cases, yes—especially when you want to avoid a large drain/refill, reduce risk to plaster, or conserve water.
Pool gallons + Calcium Hardness, TDS, CYA, pH, alkalinity, and whether it’s chlorine or saltwater.