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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