To maintain a pool yourself you need chemicals in four categories: (1) testing supplies to read the water, (2) balancing chemicals to adjust pH, alkalinity, calcium hardness, and stabilizer, (3) a disinfectant (chlorine in some form) to sanitize, and (4) algae treatment to prevent and knock down growth. Buy one product per job, store them correctly, and test every week. For an outdoor pool in North Texas, the full DIY kit plus the time to use it usually costs about the same as professional weekly service, and often more once mistakes are counted.

Thinking about handling your own pool chemistry? Good, because knowing what goes in your water makes you a better pool owner whether you DIY or hire it out. Noah walks through the full shopping list below and gives the honest math at the end.

Category 1: Testing supplies

You cannot balance what you cannot measure. Every other chemical on this list depends on an accurate reading.

• A liquid drop test kit or good-quality strips that read free chlorine, pH, total alkalinity, calcium hardness, and cyanuric acid (stabilizer).
• Fresh reagents. Reagents spoil in heat and sunlight and should be replaced about yearly. Store the kit somewhere cool, dark, and visible so you use it every week.

Category 2: Balancing chemicals

Balancing keeps the water comfortable, protects your equipment and surfaces, and lets your chlorine do its job.

• Soda ash (sodium carbonate): Raises pH. Keep dry and sealed.
• Baking soda (sodium bicarbonate): Raises total alkalinity. Safest chemical on your shelf.
• Muriatic acid (or dry acid): Lowers pH and alkalinity. Store in a second lidded bin, away from chlorine.
• Calcium chloride: Raises calcium hardness. Rarely needed in North Texas hard water; keep sealed.
• Cyanuric acid (stabilizer): Protects chlorine from sunlight. Easy to overdo; test before adding.

Category 3: Disinfectant (sanitizer)

This is the chemical that actually kills bacteria and keeps the water safe. Pick one chlorine type and stick with it.

• Trichlor tablets for a steady feed through a floater or inline chlorinator.
• Liquid chlorine for fast, unstabilized dosing.
• Granular shock (cal hypo or dichlor) for periodic oxidizing.

Never let two chlorine types meet in a bucket, a skimmer, or a chlorinator. See our guide on how to store pool chemicals safely before you buy.

Category 4: Algae treatment

In our climate algae is not a question of if, but when. Keep two things on hand:

• A preventative algaecide dosed on a schedule through the warm months.
• Shock for when the water starts to turn. Learn how to shock a pool properly before you need to.

Optional extras

Not required, but useful in specific situations: a clarifier for hazy water after a storm, a metal sequestrant if your fill water carries iron or copper, and a phosphate remover if algae keeps coming back despite good chlorine levels.

Storage and safety rules

Buying the chemicals is the easy part. Storing them wrong is where things go bad.

• Cool, dry, shaded, ventilated, and never in the garage.
• One scoop per product, labeled.
• Chlorine products separated from each other and from acid.
• No more than about six months of chlorine on hand.
• Locked or up high, away from kids and pets.

The honest math: DIY vs weekly service

For a small indoor pool or spa, DIY chemistry can be worth it. For a full-size outdoor pool in North Texas, it rarely comes out ahead. Here is why:

• Retail pricing. You buy small quantities at retail markup. A service company buys in volume.
• Waste. Chemicals lose strength in storage, reagents expire, and over-dosing to fix a mistake burns through product fast.
• The upsell. Chemical stores are set up to sell you something on every visit, and it is hard to know which recommendations you actually need.
• Time. Weekly testing, adjusting, brushing, and filter checks add up to real hours every week from March through October.
• Mistakes. A green pool, a scaled heater, or a bleached liner costs more to correct than a year of professional service.

None of that means you should not learn your pool’s chemistry. It means the decision is closer than most people expect. If you would rather have someone else own the shopping list, our weekly service plans include all chemicals, and our technicians take the leftovers with them.

Call or text 817-269-4520 for a satellite-imagery quote; no appointment needed.

---

Frequently asked questions

What chemicals do you need to maintain a pool?

You need four categories: testing supplies, balancing chemicals (soda ash, baking soda, muriatic acid, calcium chloride, stabilizer), a disinfectant such as trichlor tablets or liquid chlorine, and algae treatment (algaecide and shock).

What is the most important pool chemical?

Chlorine, because it is the only one that sanitizes the water. But chlorine only works well when pH, alkalinity, and stabilizer are balanced first, so testing supplies are a close second.

Is it cheaper to do your own pool chemicals?

For an outdoor pool, usually not by much. Retail pricing, waste, expired reagents, over-dosing, and the time involved bring DIY close to the cost of weekly service, and mistakes can push it higher.

Can a beginner maintain a pool themselves?

Yes, if they test every week, use one chlorine product at a time, store chemicals correctly, and keep the filter clean. Most problems come from skipping weeks, not from the chemistry itself.

Do I need calcium chloride in North Texas?

Rarely. Fill water across Fort Worth and the mid-cities is already hard, so calcium usually needs managing down, not up. Test calcium hardness before adding anything.