Central Garden & Pet’s Aqueon Pure Betta Beads contain beneficial bacteria that help maintain a healthy environment in unfiltered aquariums. The beneficial bacteria aids in maintaining a balanced environment while the enzymes help breakdown organic sludge for better water clarity. The soft biodegradable beads create a fun enrichment activity for bettas while also encouraging natural foraging behaviors. Aquarists can watch their betta play in and out of the beads like in a fun ball pit. Replacing beads monthly means there are fresh bacteria and enzymes and allows for a new betta home design with three colors to choose from: blue, pink and purple.