How often should the tank be cleaned? richinberlin99, 2 months ago 0 1 min read 5 A How often should the tank be cleaned? Category: arowanas-as-pets It is recommended to do a partial water change once a week, and a full tank clean every 4-6 weeks. Previous Can Arowanas be trained? Next What kind of tank do Arowanas need? Related posts Birds as Pets Senegal Parrot Sandra, 2 months ago 8 min read Dog Breeds Small Munsterlander Pointer Sandra, 2 months ago 9 min read Horse Sports Buzkashi Sandra, 2 months ago 10 min read Dog Breeds English Setter Sandra, 2 months ago 8 min read Dog Breeds Miniature Fox Terrier or Foxie Sandra, 2 months ago 9 min read Horse Breeds Shetland Ponies and Highland Ponies Sandra, 2 months ago 8 min read