Elive 1514 034303 Betta Filter with Stump, Small, Multicolor Fun and Unique Design Includes A Discreet Filter Housed Inside Of A Tree Stump Includes Replaceable Carbon and Sponge Cartridge Rated For Aquariums and Bowls From 0.5 To 3 Gallons Requires Air Pump and Check Valve Healthier Betta Fish Fewer Water Changes Replaceable Carbon &amp; Filter Sponge Requires air pump and check valve for proper operation <span class="a-text-italic">(sold separately)</span> Betta Filter with Glow Plant (01511) Betta Filter with Natural Plant (01512) Betta Filter with Volcano (01513) Betta Filer with Stump (01514) Betta Filter with Glow Plant (01511) Betta Filter with Natural Plant (01512) Betta Filter with Volcano (01513) Betta Filer with Stump (01514)