If the water corporation did some work on the pipes in your area recently, they will have increased the amount of chlorine/ chloramine in the water to kill anything that might have gotten into the water supply. When this happens the dechlorinator should be increased to compensate for the extra chlorine in the water. Unfortunately the water company never tells you when they have done work on the pipes so you don't know when you should add extra dechlorinator.
Double dosing dechlorinator and aerating for a short time before adding to the tank should get rid of any chlorine/ chloramine. If you are concerned about adding extra things to the water, try to find a basic dechlorinator like Wardleys Tri-Start, which only contains sodium thiosulphate. Sodium thiosulphate breaks down chlorine and is the main ingredients in fish dechlorinators. However, lots of companies add extra things to make their product more appealing to the consumer.
Double dosing dechlorinator and aerating for a short time before adding to the tank should get rid of any chlorine/ chloramine. If you are concerned about adding extra things to the water, try to find a basic dechlorinator like Wardleys Tri-Start, which only contains sodium thiosulphate. Sodium thiosulphate breaks down chlorine and is the main ingredients in fish dechlorinators. However, lots of companies add extra things to make their product more appealing to the consumer.
