Chaetomorpha shot glassOne SHOT GLASS PORTION of Chaetomorpha marine macro algae starter culture for natural removal of nitrates and phosphates. This grows fast and is very good at keeping your nutrients ultra low whilst out competing nuisance algaes in the aquarium. If you've not already joined the energy saving revolution of super efficient LEDs, the Tunze 8831 Eco Chic has earned itself a steller reputation for growing macro algae in reef aquaria, you can purchase here