Provided you are sure you have algae, filamentous algae, in your water.

Algae needs lots of sunlight, lots of oxygen ,

Place it in a place that gets a lot of daylight.

Get an oxygen pump if you can.

The best thing to do is to have a sandy bottom, under which you can bury small grains of rice.

Black-shelled shrimp is a generic name for hundreds of species of shrimp from China, such as Neocaridina denticulate, Caridina curvifrons, Caridina zhejiangensis, and so on, and is not the official Chinese name of a species. It is not the official Chinese name of a species.

Adult shrimp body length between 2 to 3 centimeters, body color variable. There are two pairs of small chelicerae, the chelicerae of the two fingers of the inner surface of the concave, slightly spoon-shaped, spoon-finger end of a brush-like from? The hairs (bristles) at the end of the fingers are a powerful tool for scraping algae, so they often scrape algae for food, but their algae-cleaning ability is not as good as that of the Daiwa Algae Shrimp. The body color is extremely variable and changes with the environment.