Try another method of killing them.
You buy a little test kit, and adjust the chlorine as directed.
Do you mean that adding a little chlorine made the reading go from 0 to a higher level? You should shock your pool once a week with 1L of liquid chlorine per 10000L of water in your pool. You need to add enough chlorine to break apart the combine chlorine (the combination of chlorine and dirt which doesn't sanitize.) If you don't add enough at once, it will be used up and the chlorine reading will remain low.
Cl. Big C little l.
No, just add a little more chlorine to keep the chlorine level up, since the sun breaks down chlorine quicker. Hatawa
The type of water that contains the lowest amount of chlorine is spring bottled water. Normally it contains no or little chlorine.
We added an automatic chlorinator which has made life a little simpler--if you cannot do that we had floaters in our pool all the time with tablet chlorine & we have put tablets in the skimmer basket to quickly get the chlorine in the water.
To little and bacteria can thrive, to much and it can be harmful to the body.
Alison
Chlorine production in the United States accounts for almost 30 percent of the world's capacity, but there is little international movement of chlorine because of difficulties related to its transportation and storage.
Some amount of chloride ions is essential to the human body. So little amount of chlorine will not cause harm. If a considerable amount of chlorine is inhaled, it may cause damages and infections in the respiratory system. Larger doses of chlorine may be fatal.
That was Miss Maudie.
Because sunlight breaks down the chlorine. If you add it in the morning and the sun breaks it down, you may end up with little or no chlorine in your pool by late afternoon. If that happens you will have very little defense against algae all evening and night, until the next morning. If you add your chlorine in the evening then your pool is protected all evening and night, and the sun doesn't start working on it until morning. If the chlorine is low or gone by late afternoon and you dose the pool again in the evening, there is very little time when your pool is unprotected!