Australian Pet Supplies Fishguard supports the slime coat on fish coat and helps condition the water. FISHGUARD has the benefits of Aloe Vera supporting fish slime coat and protects them against adverse water conditions and damage to skin and scales. FISHGUARD protects fish that have minor scrapes and cuts allowing natural mucus layer to regenerate. Keeping Healthy fish has never been easier. FISHGUARD will also bind up heavy metals and neutralise chlorine, chloramines and ammonia.