Pool water chemistry
ChlorBench
Pool volume and chemical doses worked out, not guessed.
- 1Total Alkalinity — The Number That Decides Whether pH Stays Put
People chase pH and never fix the reason it moves. The reason is almost always alkalinity, and it is one adjustment away.
- 2Calcium Hardness — Water That Cannot Get Calcium Takes It From the Pool
A vinyl pool tolerates almost any hardness. A plaster pool with soft water is quietly dissolving, and the damage is not reversible.
- 3How Much Stabiliser to Add — And Why It Takes a Week to Read
The most common way a pool ends up with far too much stabiliser is adding a second dose because the first one had not shown up yet.
- 4Pool Pump Replacement Cost — and Why the Cheap One Costs More
A variable-speed pump costs two to three times a single-speed to buy and pays the difference back in under two seasons. On most pools the cheap pump is the expensive one.
- Pool Chemical Cost per Year, Broken Down by Volume
- Free, Total and Combined Chlorine — the Reading That Explains the Smell
- Average Depth of a Sloped Pool: When the Simple Average Is Wrong
- What a Pool Actually Costs to Run per Month, Line by Line
- How Much Shock for a Green Pool — the Target Is a Number, Not a Bag
- Cal-Hypo, Dichlor, Trichlor or Liquid: What Each One Adds Besides Chlorine
- Chlorine to CYA Ratio Chart: The Table That Replaces "1 to 3 ppm"
- How Long After Shocking Can You Swim? Test, Do Not Wait
- How Much Muriatic Acid to Lower pH, and Why Alkalinity Decides the Answer
Chlorine dose by pool volume
300 calculations · Chlorine & Shock · browse all
- How much liquid chlorine for a 12 ft round pool to raise chlorine 1 ppm
- How much dichlor for a 24 ft round pool to raise chlorine 1 ppm
- How much liquid chlorine for a 12 × 24 ft oval pool to raise chlorine 2 ppm
- How much dichlor for a 18 × 36 ft oval pool to raise chlorine 2 ppm
- How much liquid chlorine for a 14 × 28 ft rectangular pool to raise chlorine 5 ppm
- How much dichlor for a 18 × 36 ft rectangular pool to raise chlorine 5 ppm
pH, alkalinity and hardness
500 calculations · pH, Alkalinity & Hardness · browse all