Giant Microbes Original Scum (Biddulphia) Plush Educational Toy

Introducing Giant Microbes Original Scum, Biddulphia—the diva of the single-celled algae world! This phytoplankton, found as light brown scum on the walls of fish tanks (or on rocks in the ocean), is a must-have for any aquarium. Keep your tank clean and your fish happy with water testing and circulation, and don't forget to bring in the heavy artillery—algae eaters such as glass shrimp and small sucker-mouthed fish (!!).