LANDEN Balagen sand is sourced from unpolluted natural riverbeds, formed by the long-term scouring of water, with whole, rounded, small pebble-like grains and no sharp edges, making it suitable as a scenic substrate in the aquascape and ornamental fish waters, as well as creating views of riverbeds and streams in nature. The stream sand comes in a variety of colors, yellow, white, red, and grey, with bright colors and a very soft color when wet, which perfectly simulates a restored wild environment and helps to color native fish such as goby, rhodium, and broaden minnow, which lives in streams all year round. Landen's gravel is unbleached and has no artificial colors or preservatives, making it safe for aquatic life. Used in aquascaping to create the effect of natural environments such as river beds, waterways, and sandy beaches, Stream Sand is the gravel of choice for designing native tanks. Its natural, understated natural color and texture create a natural aesthetic for aquariums, complementing the fish that like to feed in the rocky crevices of streams and can be planted with aquatic ferns. Stream sand is a natural silicate sediment. The microorganisms and bacteria on its surface help decompose waste and harmful substances and adsorb some ions from acidic substances onto its surface, buffering the pH of the water body and stabilizing the water quality. Its particle structure is rich in pores, which provides a large surface area for filtration and attachment of organisms. It also effectively adsorbs and stores water and nutrients and filters impurities. These pores are also ideal habitats and breeding grounds for beneficial microorganisms, promote the self-purification of the water column. Small to medium-sized stream sands have a fine texture and can be used to create delicate water effects, such as fine sandy beaches and underwater dunes, or to create natural and smooth riverbed contours to add a sense of realism. It can also be filled in between rocks to creat