My Fun Fish Kid's Self Cleaning Beta Aquarium Bowl Tank by Unknown My Fun Fish is the aquarium that cleans itself. Turns water fresh, oxygenated & clean. Just add clean water. Watch your fun tank light up. Includes: My fun fish tank, 1 white LED Light, Riverbed Stones, 1 Aquatic Plant. The LED light already contains two lithium (CR 2025, 3V) batteries.