So when I filled my 6x2x2 I used a 10gallon bucket adding aquasafe to the bucket each time. This took me hours as you could imagine. Now im ready to set up my 450ltr for my tanganyikan cichlids but I plan to fill the whole tank up using a hose connected to the garden tap. Obviously I don't plan to add any fish to the tank until it is cycled. So my question is : After I have filled the tank up from the hose. Do I need to add aquasafe afterwards or will the chlorine/ heavy metals go away by itself in time? Many thanks