Lee's Aquarium & Pet Products Betta Keeper®Create a spectacular eye catching Betta display. The Large Betta Keeper uniquely houses one or two Betta Splendens (Siamese Fighting Fish) or even a fancy goldfish. The close proximity of the Bettas stimulates them to intensify their colors, spread their fins and flare their gills. Makes a great gift idea for Betta or Goldfish Fanciers. Nest or stack multiple units. Ridges on the lid allow for easy stacking. Modular design even allows you to mix Lee's