well non dechlorinated water will kill the bacteria, which are needed to keep ammonia down, turtles can die of amonnia poisioning, so using a dechlorinator is very important, some dont use it and they havn�y had any problems- but if they try to keep fish in the tank they will die.
Here is a simple guide on how to easily dechlorinate water
1……Cycling (the Nitrogen Cycle)
15….Fish Food & Feeding
19….Stocking Your Tank
20….Acclimating New Fish
AquaSafe Aquarium Dechlorinator Conditioner | Tetra Aquarium
Using an aquarium conditioner or dechlorinator helps to remove residual chlorine and heavy metals from tap water that are harmful for aquarium fish, shrimps and helpful bacteria. A good water conditioner is very necessary for as well as maintenance that decides if you succeed in keeping your fish tank or not.
Best Dechlorinator? - Aquarium Advice - Aquarium Forum Community
Though the dosages of these chemicals in the water supply are lowenough that they are not harmful to land animals (including people,dogs, cats, hamsters, horses, etc) or house plants, they are highenough to cause damage to your biological filter. This damage willallow ammonia to start to build up in the tank, eventually becomingharmful to your fish. For this reason it is important that you treatyour water to remove chlorine with an appropriate dechlorinator beforeyou add it to your tank.I have also had some issues with some of the "fancier"dechlorinators in tanks with reptiles or amphibians (frogs, turtles,newts, salamanders, etc.), and with other "fancier" dechlorinators intanks with invertebrates (crayfish, lobsters, shrimp, snails,etc.). My recommendation in this case would be to use a regulardechlorinator without unnecessary additives.One common problem that occurs with some of the "fancier"dechlorinators, is that they can leave a buildup over time. This isparticularly of concern in , in tanks where the product has been over used, or in tankswith insufficient . Keeping yourfish in a large enough tank, keeping the tank well filtered, and beingcareful not to overdose the water treatment can help alleviate this -or you could just use a regular dechlorinator without unnecessaryadditives.Whether you are concerned about chlorine in your drinking water, fish tank, or swimming pool, you may be interested in learning how to dechlorinate water. Chlorine is a poisonous gas that is added as a disinfectant to tap water. This addition to the water supply controls the proliferation of bacteria and neutralizes other harmful substances. However, chlorine can be harmful and sometimes fatal to aquatic life as well as cause potential problems in humans.