These doses are for 65% calcium hypochlorite (cal-hypo). Adjust proportionally for other concentrations. Always add pre-dissolved to the pool, never to the skimmer.
Cal-Hypo (65%) Shock Dose by Pool Volume
| Pool Volume | Maintenance / Breakpoint CC 1 ppm (10 ppm raise) | Breakpoint CC 2 ppm (20 ppm raise) | Green Pool (30 ppm raise) |
|---|---|---|---|
| 5,000 gal | 0.64 lb | 1.28 lb | 1.92 lb |
| 8,000 gal | 1.03 lb | 2.05 lb | 3.08 lb |
| 10,000 gal | 1.28 lb | 2.57 lb | 3.85 lb |
| 12,000 gal | 1.54 lb | 3.08 lb | 4.62 lb |
| 15,000 gal | 1.92 lb | 3.85 lb | 5.77 lb |
| 18,000 gal | 2.31 lb | 4.62 lb | 6.93 lb |
| 20,000 gal | 2.57 lb | 5.13 lb | 7.70 lb |
| 25,000 gal | 3.21 lb | 6.42 lb | 9.62 lb |
| 30,000 gal | 3.85 lb | 7.70 lb | 11.54 lb |
Notes
- Doses use the site-wide approved mass-balance formula (ppm increase x gallons x 0.013344 / 65) for 65% calcium hypochlorite. A breakpoint dose is 10x the combined-chlorine (CC) reading, so a CC of 1 ppm requires the same 10 ppm FC raise as a routine maintenance dose -- the two leftmost dose columns are the same figure for that reason, not an error. Green pool dose targets a 30 ppm FC raise. These figures are a manual reference; the live shock calculator offers fixed presets (5, 10, 15, or 20 ppm) rather than the full range shown here.
- Pre-dissolve granular shock in a bucket of water before adding to pool.
- Add after dark. Run pump overnight. Do not allow swimming until FC drops below 5 ppm.
- For 73% cal-hypo, multiply doses by 0.89.
Sources:
- Taylor Technologies — Pool/Spa Water Chemistry Reference