What type of tank are they in. It looks a little like an above ground swimming pool only much shallower.
Is this it?
Amazon.com: Epic Pond Rectangle Flexible Koi Fish Show Tank & Pond Fish Quarantine Tank (59 x 59 x 27.6 inch) - 415 Gallons : Pet Supplies
Amazon.com: Epic Pond Rectangle Flexible Koi Fish Show Tank & Pond Fish Quarantine Tank (59 x 59 x 27.6 inch) - 415 Gallons : Pet Supplies
www.amazon.com