If your water provider uses chloramine (AKA Total Chlorine) as a disinfectant, it will "not" off gas. This is why most US water providers now use Chloramine, it has a longer lasting disinfection residual, and doesn't create carcinogenic trihalomethanes.. I did an experiment in the lab testing chloramine in a non-organic filled container, and after two weeks, the residual had barely dropped.
Straight chlorine (free chlorine) will.
Both kinds "will" however be neutralized by the organics in the aquarium.
My suggestion would be to get a DPD Chorine/chloramine test (available at pool supply store) and check the Cl2 ppm in the tank, instead of relying the residual coming straight from the tap.
You may be surprised how fast organics in the aquarium use it up.
Straight chlorine (free chlorine) will.
Both kinds "will" however be neutralized by the organics in the aquarium.
My suggestion would be to get a DPD Chorine/chloramine test (available at pool supply store) and check the Cl2 ppm in the tank, instead of relying the residual coming straight from the tap.
You may be surprised how fast organics in the aquarium use it up.
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