Adding Dechlor

[Fintastic!]

I know someone posted this before but I can't find it so sorry for going over old ground, but when topping up after a water change can I add the amount of dechlor needed for the fresh water to the tank and then pour in the fresh water straight from the tap? While the fish are in the tank?
I've been using an old saucepan and putting the amount of dechlor for the amount in the saucepan so traipsing from kitchen to living room, getting water to proper temp, adding dechlor around 6 times each water change......

 

[KittyKat]

Two ways:

• Add water to container, dechlorinate water in container (in any order).
• Add enough dechlorinator to the aquarium to dechlorinate *all* the water (old and new), add the new water. You may want to switch the filter off for this method.

 

[Delloy12]

Two ways:

• Add water to container, dechlorinate water in container (in any order).
• Add enough dechlorinator to the aquarium to dechlorinate *all* the water (old and new), add the new water. You may want to switch the filter off for this method.

I use the first method. It feels more safer.

 

[Fintastic!]

KittyKat, I do believe I'd be lost without you! Just to clarify-I can do the second method while the fish are still in the tank?

 

[KittyKat]

Just to clarify-I can do the second method while the fish are still in the tank?

Yes, dechlorination is basically instant on contact with the dechlorinator.

Edit: Chloramine and chlorine are not *that* harmful in small quantities over short periods of time and chloramine is actually used to treat gill parasites in commercial fish farming.

Edit 2: But a recent experiment of mine consistently showed that a 10% top-up with chloraminated water (which had enough chloramine to produce 0.25 ppm ammonia on dechlorination) was enough to stall a cycled filter for 2-3 days.