Because I use tap water I have to use a dechlorinator (I use Tetra, AquaSafe) but when I want to change about 25% of the water do I have to add the Tetra to the new water I'm going to put in the tank? I don't want add too much into the tank.
It does say on the bottle add 5ml to every 10 liters.
It does say on the bottle add 5ml to every 10 liters.