Pool Chemistry API
Swimming-pool water-chemistry maths as an API, computed locally and deterministically — the dosing and water-balance numbers a pool service tech or owner runs at every visit. The chlorine endpoint works out how much of a product to add to raise free chlorine from the current to a target ppm in a given volume: dose (g) = Δppm × litres / 1000 ÷ the product's available-chlorine fraction, with built-in strengths for liquid chlorine (12.5 %), household bleach (6 %), cal-hypo (65 %), dichlor (56 %) and trichlor (90 %), or your own — raising 50,000 litres by 2 ppm needs 800 g of liquid chlorine or 154 g of cal-hypo. The lsi endpoint computes the Langelier Saturation Index, LSI = pH + temperature factor + calcium factor + alkalinity factor − 12.1, the standard measure of whether water is corrosive (below −0.3, eating plaster and metal), balanced (−0.3 to +0.3) or scaling (above +0.3), with a cyanuric-acid correction to the carbonate alkalinity. Everything is computed locally and deterministically, so it is instant and private. Ideal for pool-service, spa, water-treatment and home-maintenance app developers, dosing and water-balance tools, and pool-care education. Pure local computation — no key, no third-party service, instant. Metric: litres, ppm (mg/L), °C. Live, nothing stored. 2 compute endpoints. Always confirm with a test kit — this is an aid, not a substitute. For pool water volume use a pool-geometry API.
api.oanor.com/poolchem-api
