Tank Calculator
Water Tank Dosing Calculator
Pick the product, enter the tank, and we'll work out the litres and the regular and shock dose.
Product
How much water is in the tank?
Measure across the top of the tank and its height.
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How full is it?
15,551 L
Water in the tank
First (shock dose)
—
Off drinking supply 24 - 48 hours
Regular dose
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Safe to drink straight away
Full dosing table
Regular doseWater is fit to drink straight away. Re-dose only once a test strip reads zero.
Shock doseTake the tank off drinking supply for 24 to 48 hours, then test at the tap. It must read 5 ppm or less before anyone drinks it.
Handling 50%Wear gloves, eye protection and the correct PPE. Take the correct transport precautions and secure the containers in transit. The containers have a vented cap, so they must be kept upright.
Silver does not break downThe peroxide breaks down into water and oxygen. The silver does not. It stays in the tank until the water is used, so every shock adds to what is already there.
Australia's Drinking Water Guidelines set a silver limit of 0.1 mg/L. It comes from a human lifetime no-effect level of 10 g of silver. Above that, silver builds up in the skin and can cause argyria, a permanent grey-blue tint. The guideline allows half of a person's daily silver intake to come from water, at 2 L a day.
A 30,000 L tank as a comparison: one 7.5% Silver shock (15 ppm) uses about 5.8 L of product and adds about 584 mg of silver, or 0.019 mg/L. That is about a fifth of the 0.1 mg/L limit. Around five shocks into the same water would reach it.
Australia's Drinking Water Guidelines set a silver limit of 0.1 mg/L. It comes from a human lifetime no-effect level of 10 g of silver. Above that, silver builds up in the skin and can cause argyria, a permanent grey-blue tint. The guideline allows half of a person's daily silver intake to come from water, at 2 L a day.
A 30,000 L tank as a comparison: one 7.5% Silver shock (15 ppm) uses about 5.8 L of product and adds about 584 mg of silver, or 0.019 mg/L. That is about a fifth of the 0.1 mg/L limit. Around five shocks into the same water would reach it.
The Australia New Zealand Food Standards Code allows a maximum hydrogen peroxide residual of 5 mg/kg. The regular dose (2.5 to 3 ppm) sits under this. The shock dose (15 ppm) does not, so test at the tap before anyone drinks the water. Shock doses need a 24 to 48 hour stand-down from drinking.