Pool Calculators & Tools
Free chemistry calculators based on TFP/SLAM methodology. No signup required.
Quick Water Test
Fast entry for all readings with instant dosing recommendations and LSI calculation.
Chlorine / SLAM Calculator
Calculate chlorine dosing based on your CYA level. Includes SLAM (Shock Level And Maintain) targets.
pH Calculator
Calculate muriatic acid or soda ash needed to adjust your pool pH to the ideal range.
Alkalinity Calculator
Calculate baking soda dosing to raise your Total Alkalinity (TA) and stabilize pH.
CYA / Stabilizer Calculator
Calculate cyanuric acid dosing to protect your chlorine from UV sunlight degradation.
Calcium Hardness Calculator
Calculate calcium chloride needed to raise CH and prevent plaster etching or liner damage.
Salt Calculator
Calculate how much salt to add to your salt water pool for your SWG system.
Pool Volume Calculator
Calculate your pool's volume in gallons from its dimensions. Supports all pool shapes.
Pool Checklists
Printable checklists: SLAM process, weekly maintenance, pool opening, and winterizing.
Ideal Pool Chemistry Ranges
Keep your pool water balanced within these recommended ranges:
| Parameter | Ideal Range | Notes |
|---|---|---|
| Free Chlorine (FC) | Based on CYA | Keep FC/CYA ratio. Min FC = CYA รท 20 (rounded up) |
| pH | 7.4 - 7.6 | Affects chlorine effectiveness and comfort |
| Total Alkalinity (TA) | 60-80 ppm (SWG) / 80-120 ppm | Buffers pH; SWG pools run lower |
| Cyanuric Acid (CYA) | 30-50 ppm / 70-80 ppm (SWG) | Protects chlorine from sunlight |
| Calcium Hardness (CH) | 250-400 ppm (plaster) / 150-250 ppm (vinyl) | Prevents etching and liner damage |
| Salt (SWG only) | 3000-3500 ppm | Check your specific SWG manufacturer |
What is TFP/SLAM?
TFP (Trouble Free Pool) is a methodology for maintaining crystal clear pool water using the FC/CYA relationship chart instead of arbitrary "shock" levels. It emphasizes testing and adjusting based on actual water chemistry rather than guessing.
SLAM (Shock Level And Maintain) is the TFP process for clearing algae or cloudy water. You raise chlorine to "shock level" based on your CYA, then maintain it 24/7 until you pass three tests: clear water, zero CC, and overnight FC loss under 1 ppm.
These calculators use TFP methodology to give you accurate dosing based on your actual pool chemistry, not one-size-fits-all recommendations.
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