It's about 1 teaspoon of chlorine powder per 60 gallons... although I have no idea if some brands are less pure than others.

This is why it's best to chlorinate large volumes of water at a time, or even your entire water butt or water tank a few hours before you need it.

All water treatment chemicals are dangerous if you don't measure them responsibly, which is why you need to do some research based on the chlorine power you purchase.

If you've got a standard 52 gallon water butt or a large water tank, then you'll need to do some calculations about how much chlorine you need based on the volume of water.

Chlorinating a 5 or 8 gallon jerry can becomes risky because you'll be using such a tiny amount of chlorine (1/10th of a teaspoon) that accurate measurements become difficult.

Any pool chlorine will do, the cheaper the better because you don't want any additives like blue coloring or other bullshit. I'd recommend powder rather than granules because it'll help you make more accurate measurement.

NOTE that all of my estimates in this comment are based on the brands that I've bought. They may vary from state to state and country to country and some brands may be less pure than others... I have no idea how many different brands of pool chlorine power exist in the world. I do the math based on whatever product I've purchased.

It's about 1 teaspoon of chlorine powder per 60 gallons... although I have no idea if some brands are less pure than others.

This is why it's best to chlorinate large volumes of water at a time, or even your entire water butt or water tank a few hours before you need it.

All water treatment chemicals are dangerous if you don't measure them responsibly, which is why you need to do some research based on the chlorine power you purchase.

If you've got a standard 52 gallon water butt or a large water tank, then you'll need to do some calculations about how much chlorine you need based on the volume of water.

Chlorinating a 5 or 8 gallon jerry can becomes risky because you'll be using such a tiny amount of chlorine (1/10th of a teaspoon) that accurate measurements become difficult.

Any pool chlorine will do, the cheaper the better because you don't want any additives like blue coloring or other bullshit. I'd recommend powder rather than granules because it'll help you make more accurate measurement.

NOTE that all of my estimates in this comment are based on the brands that I've bought. They may vary from state to state and country to country and some brands may be less pure than others... I have no idea how many different brands of pool chlorine power exist in the world.