The link took me to the site but not to your specific post. I briefly browsed the site and I must say I am pretty horrified with the 'advice' they offer. Things such as goldfish only need 2.5g per fish, water changes should be less than 30% because wcs 'remove good bacteria', carbon removes ammonia and will prevent a tank from cycling, use garlic to treat ich, mint tea to cure a sick goldfish, blahblah are all ridiculous and I honestly feel bad for anyone that is following the 'advice' they are offering. If you would like to seek advice from actual goldfish owners and breeders, try the Goldfish Keepers forum or Kokos Goldfish forum.