Verify at the dripper
The calculation is the applied dose. Measure free chlorine at the farthest dripper and maintain the current FRA target of 0.5–2 ppm.
Front Row Ag · Team reference
Calcium hypochlorite calculator
Select the stock recipe, enter the target, and use the calculated rate. Calculations use DryTec's guaranteed minimum 65% available chlorine.
Stock solution workflow
Prepare the stock first, then calculate how much to use.
Mix the stock solution
Choose the concentration and final stock-tank volume.
g/gal
Edit this value to use a custom stock rate.
US gal
Normal range: 1–50 US gal.
Stock concentration11 g/gal
Total DryTec required55 g
Add 55 g DryTec to water, then bring the final volume to 5 US gal.
11 g/gal is FRA's standard concentration. Higher concentrations may dissolve more slowly or leave sediment.
Determine how much stock to use
Set the chlorine target and the volume of water being treated.
ppm
US gal
Usage ratePrepared stock per treated water
4.01 mL/gal
Inject 4.01 mL of prepared stock per gallon of irrigation water.
Equivalent injection setting0.106%
Total stock for 100 US gal400.82 mL
The calculated 0.106% setting is within the MZ3000's 0.03–0.3% range.
Add powder directly
Enter the treated volume and target applied chlorine.
US gal
ppm
DryTec requiredFor 100 US gal at 2 ppm
1.16 g
Add 1.16 g DryTec to 100 US gal of treated water.
Direct-dose quick table
Theoretical applied chlorine using DryTec at 65% available chlorine.
| Applied chlorine | DryTec / 100 US gal | Operational reference |
|---|
The 0.5–2 ppm rows are FRA's continuous-use residual range at the farthest dripper. Elevated cleaning references are not continuous-use plant targets. Verify the measured residual after system demand.
Field verification and other application points
System demand can consume chlorine before it reaches the dripper. Use the measured residual to adjust the applied rate.
ppm
Fertilizer stock concentrate guidance
Keep the applied chlorine dose at or below 2 ppm based on the final fertilizer-stock volume. Add it only after roughly 90% of the final water volume is already in the tank, then complete filling and mixing. This avoids a brief localized overconcentration.
The 2 ppm limit applies to the finished fertilizer stock concentrate. It does not limit the concentration of a separate DryTec dosing stock.
DryTec handling and mixing
- Use clean, dry tools.
- Add DryTec to water. Never add water to DryTec.
- Wear chemical-resistant gloves and eye protection.
- Avoid breathing dust and use adequate ventilation.
- Store DryTec cool and dry in its original container.
- Keep DryTec away from acids, organic material, and other incompatible products.