So I've had 4 gold fish the first 2 died within 3 days the latest 2 one died in a matter of hours and the other one is at deaths door! The first 2 the tank didn't have an air pump and I believe I added too much tapsafe the latest two were held in a finding nemo tank complete with air pump bought from pets at home in which i followed the instructions on the box however I didn't add tapsafe because I was unsure how much to add! Why are my fish dying? What should I be using and how? Obviously I'm a beginner are there any guides to follow?