Micro-algae plate cultures save having to sub-culture masters in the lab. These petri-dish cultures of the most common aquaculture species will last for over six months in a cool, dark place. They’re really easy to reactivate too. To culture just add autoclaved culture water to the petri dish to cover the culture, re-cover the disk and provide light for a day. Then use a sterile cotton swab to wipe the cells into your usual culture medium in sterile seawater and culture as you would a normal master culture. Current plate cultures available are Nannochloropsis, Isochrysis, Tetraselmis. Save time, avoid culture loss in transit.