I've just set up a piping system so I can drain and refill directly into my tank. Now I'm wondering a couple things.

First, I can no longer add chlorine remover to the water I'm adding so is it OK to just add it directly to the tank just before I refill? Do I use the same amount as always?

Secondly, I have a whole house carbon filtration system so will this remove all the chlorine and chloramines anyway?