you'll never get what you want if you'll always let people step all over you -planktonWhat do we imagine when we hear the word Covid-19?Ah, of course it's not foreign, isn't it?Corona Virus Disease 19, hereinafter referred to as Covid-19, has penetrated into Indonesia since December 2019. With this virus, it has caused extraordinary changes to Indonesian society.If this virus is not handled quickly and appropriately, it will have a bigger effect and tend to reduce the human population because this virus is life threatening, as is the case in Indonesia, which currently has 1.48 million deaths.The government has tried to overcome the spread of Covid-19 in various ways, one of which is PSBB (Large-Scale Social Restrictions).The enactment of this PSBB is to prevent crowds that will cause new clusters in Covid-19.The government has taken various measures to prevent the spread of Covid-19.Even according to Singapore University University and Design's Driven Innovation Lab research, Covid-19 will be completed in December 2020. But in fact, until now, Thursday, March 25, 2021, Covid-19 has not really been declared lost.In fact, we must try to make peace with Covid-19.The government has also issued a vaccine, as a form to adjust to the current situation.However, in fact, the Indonesian people have not yet fully received the vaccine.Besides Covid-19 which never ends, we as humans still have to survive by continuing to be optimistic and adapt with all our might to the current situation and conditions.Now, entrepreneurs and entrepreneurship may be required to be able to prepare a well-thought-out plan so that the business carried out in the future is more stable and continues to grow so that it does not experience a decline.Whether it's income or interest in the goods we produce.In other words, we must join the war against the current situation by continuing to try.Indeed, the Covid-19 pandemic has felt very difficult.Businesses from various fields that were initially pioneered by Indonesian entrepreneurs experienced a drastic decline.Many entrepreneurs complain that it is difficult to maintain their business.Not infrequently, in conditions like this we find small businesses that are closed because they "lost in the war against the situation". .With conditions that force us to adapt more like today and we are required to stay productive so that our income or needs are also met, the ability to innovate is very necessary.By providing new breakthroughs, such as creating a business idea that is most felt to meet the needs of the community in this pandemic era and doing or opening a business field that is cheap but with quite a promising income.So what should entrepreneurs do?Start up that we should do is to start a business from now.Because if not now, when?A lot of research has been done and states that cultivation is a simple thing that will open up business opportunities with a fairly minimal level of loss.Especially in the cultivation of Spirulina sp.How come?This microalgae has good potential if cultivated.Why can it be said so?This is because the evidence in the market also shows that with the increasing demand ratio of Spirulina sp.In addition, the content of spirulina in general has the nutrients needed by humans such as protein, fatty acids, vitamins and high antioxidants.Even what is currently rife is the existence of spirulina masks which are widely used by Indonesian women who are believed to be the mainstay of cosmetics for removing pimples, blackheads and smoothing the surface of the facial skin.In the pharmaceutical sector, spirulina is also used as medicine.Chinese society today even consumes this microalgae directly after harvesting.From a geographical point of view, Indonesia certainly has tremendous potential if it wants to cultivate spirulina.Indonesia's tropical latitudes have a fairly high temperature at 21-32 degrees Celsius with average sunlight intensity.Fresh and marine spirulina can live in this area.So, the potential of this promising culture of spirulina cultivation can be Indonesia's mainstay product to increase the country's foreign exchange.Especially in the midst of a pandemic like this.Because basically spirulina culture must pay attention to the factors of temperature, irradiation, nutrients, salinity, alkalinity and the provision of good culture media and good care.This is quite easy to implement because the setup mechanism is also not too difficult for beginners.In terms of price or cost, many spirulina cultures are recommended to do.Why?Yes, obviously including cheap but promising.Even the land required is not too wide.In 0.6 m2 of land, spirulina can grow well and without any constraints such as limited space, because the culture of spirulina is certainly different from the culture of organisms such as pelagics which require space or space that is far away.Turning to the water side, spirulina requires only 2100 liters of brackish water.Of course this includes saving in doing culture.After we know the various benefits of cultivating spirulina, of course we are definitely interested in trying it at home.What are you waiting for?The steps that must be taken and prepared are: The land to be used must be considered properly.It can be in tanks made of plastic or cement.The breadth range is 10x5x1.5 feet.The temperature should be in the range of 25 to 35 degrees Celsius. Pour 1000 liters of water and 2 feet deep.After that, add 0.2 grams of urea, 8 grams of sodium bicarbonate, 0.16 grams of magnesium sulfate, 5 grams of sodium chloride, 0.052 ml of phosphoric acid, 0.5 grams of potassium sulfate and 0.05 ml of ferrous sulfate.And stir it every day for an hour and a half for a week. After 10 days, spirulina can be harvested by preparing just a few tools.Namely a small plastic bucket and a filter.After that, strain and discard the water that was carried in the filter.Then use a clean muslin cloth intended for squeezing and ensure well that there is no more water in the spirulina filter when it is harvested. Dry the spirulina for only 2 to 3 hours. Spirulina can be sold and ready to be delivered to consumers either directly or in processed form. such as medicines, cosmetics and food raw materials such as super food.