Interpet Gold Tap Safe 100ml makes tap water safe for use in goldfish homes. This treatment will remove harmful chlorine and heavy metals from your water and at the same time add protective colloids to give the goldfish a protective layer around their delicate skin and fish membranes. This means that your goldfish will enjoy spending time in their habitat and have a long, healthy life. Part of the Healthy Home range, for all tanks, bowls and orbs.