The Cascade 9-Piece Betta Starter Kit offers a great value for new fish owners, or for aquarists looking to get most of the tools needed for Betta keeping. This Aquarium Kit comes with Nano Air Pump, Mini Sponge Filter, 2.5 feet of Airline Tubing, Check Valve, Betta Leaf, Cleaning Sponge, 3 Fish Net, Strip Thermometer, and 1 lb. of Decorative Zeolite Crystals. Please Note: fish and tank sold separately. The decorative substrate naturally absorbs ammonia in a fast and timely manner, along with waste, toxins, and odors