Balancing pool water is about correcting each level in the right order: total alkalinity first, then pH, then chlorine (sanitizer), and finally calcium hardness and stabilizer. Alkalinity buffers pH, so fixing it first keeps everything else stable. Test with a good kit, adjust one thing at a time, run the pump, and re-test the next day. In Houston heat and sun, chlorine and stabilizer get used up fast, so weekly testing is the habit that keeps water clear and prevents the green-pool cleanups nobody wants.
What you'll need
- A reliable test kit or test strips
- A 5-gallon bucket for pre-dissolving chemicals
- A pool brush
- Chemical-safe gloves and eye protection
- A long stir stick
Recommended parts & supplies
- Pool water test kit, a drop-test kit reads more accurately than strips
- pH increaser / decreaser, soda ash raises pH, dry acid lowers it
- Alkalinity increaser (baking soda), buffers pH so it stops bouncing
- Cyanuric acid (chlorine stabilizer), protects chlorine from the Houston sun
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Step by step
- 1
Test the water and write down every level
Collect a sample elbow-deep, away from the return jets, and test it. Note total alkalinity (aim for 80–120 ppm), pH (7.4–7.6), free chlorine (1–3 ppm), calcium hardness (200–400 ppm), and cyanuric acid / stabilizer (30–50 ppm). Writing them all down first lets you plan your dosing instead of chasing one number and knocking another out of range.
- 2
Correct total alkalinity first
Alkalinity is the buffer that keeps pH from bouncing, so fix it before anything else. If it is low, add an alkalinity increaser (baking soda); if it is high, small doses of dry acid bring it down. Add chemicals slowly with the pump running, and re-test after it circulates. Getting this in range makes every later adjustment hold.
- 3
Adjust the pH
With alkalinity set, check pH. Below 7.2 the water is acidic and corrodes equipment and stings eyes; above 7.8 it turns cloudy and lets scale form while weakening your chlorine. Use a pH increaser (soda ash) to raise it or a pH decreaser (dry acid) to lower it. Pre-dissolve acid in a bucket of water, never the reverse, and pour it around the pool with the pump on.
- 4
Set your sanitizer (chlorine)
Now bring free chlorine to 1–3 ppm. Chlorine only works well when pH is already in range, which is why it comes after. Use tablets in a floater or feeder for steady dosing, or add liquid chlorine for a faster bump. In peak Houston sun you may need to dose more often, because UV burns chlorine off quickly.
- 5
Check calcium hardness and stabilizer
Calcium hardness (200–400 ppm) keeps water from being corrosive or scaling; low calcium can be raised with a hardness increaser. Cyanuric acid, or stabilizer (30–50 ppm), is sunscreen for your chlorine, too little and the sun destroys it, too much and the chlorine gets sluggish. Adjust these last, since they move slowly and mostly need topping up.
- 6
Brush, circulate, and re-test tomorrow
Brush the walls and floor to mix everything in, then let the pump run several hours. Chemistry needs time to circulate and settle, so re-test the next day rather than chasing numbers minute to minute. Once you are dialed in, a quick weekly test and small top-ups keep the water clear all season.
When to call a pro
Call a pro if the water stays cloudy or you cannot get a level to hold no matter what you add, that often means high dissolved solids that only a partial drain and refill will fix, or a metals/stain problem that needs specialty treatment. Anything involving the electrical side of a salt chlorine generator, or a pool that has gone fully green, is worth handing off. And never mix pool chemicals together or add them straight to the water undiluted; if you are unsure what is reacting, stop and get help before you create a dangerous gas.
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How to Balance Your Pool Chemistry (The Right Order to Test and Dose), FAQ
What order should I add pool chemicals in?
How often should I test my pool water in Houston?
Why is my pool water cloudy even though chlorine is fine?
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