{"product_id":"spirodela-polyrrhiza-tissue-culture-tropica","title":"Spirodela Polyrrhiza - Tissue Culture - Tropica","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSpirodela polyrrhiza | Greater Duckweed, a Fast-Growing Floating Plant for Shade and Cover\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eSpirodela polyrrhiza, commonly known as Greater Duckweed, is a floating plant with small, round, green fronds and short roots that hang down into the water. It is larger than common duckweed, and it spreads across the surface to give a calm, pond-like look. Beyond appearance, it is a practical plant: the cover it creates gives fish and shrimp shelter, softens bright lighting, and helps keep a tank balanced.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eEasy to care for and fast growing, it suits beginners and experienced aquarists alike. It is especially useful in tanks with fish that prefer dim, shaded water, in breeding setups where fry need cover, and in planted tanks where excess nutrients need soaking up.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural shade:\u003c\/strong\u003e Offers shelter for fish and reduces light penetration, which suits shy and blackwater species\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlgae control:\u003c\/strong\u003e Competes with algae for nutrients, helping to limit algae growth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater quality:\u003c\/strong\u003e Absorbs excess nutrients efficiently as it grows\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCover for fry and shrimp:\u003c\/strong\u003e The roots and surface mat give young fish and shrimplets a sheltered place to hide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCare at a Glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eScientific name: Spirodela polyrrhiza\u003c\/li\u003e\n\u003cli\u003eAlso known as: Greater Duckweed, Giant Duckweed\u003c\/li\u003e\n\u003cli\u003eOrigin: North America\u003c\/li\u003e\n\u003cli\u003eType: Floating plant\u003c\/li\u003e\n\u003cli\u003eGrowth rate: Fast\u003c\/li\u003e\n\u003cli\u003eLight demand: Low to moderate\u003c\/li\u003e\n\u003cli\u003eCO2: Not required\u003c\/li\u003e\n\u003cli\u003eBest placement: Floating on the water surface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eKeeping It Balanced\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eBecause Spirodela grows rapidly, regular thinning is recommended. Left unchecked, it can cover the whole surface and block light from submerged plants, so scoop out the excess every week or two to keep the coverage balanced. The surface should stay partly open so that light reaches your submerged plants and so that fish can reach the surface to breathe. If you ever need to remove it entirely, be aware that duckweed is hard to eliminate once established, so start with a small amount.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eGetting Started\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eSimply place the plants on the water surface. They need no planting or attachment. For best growth, keep the light low to moderate and make sure the tank has a supply of nutrients. Floating plants grow most vigorously in calm water, so a gentle flow at the surface suits them best.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCompatible With\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eAll community fish, shrimp, and snails\u003c\/li\u003e\n\u003cli\u003eEspecially suited to fish that appreciate shade and surface cover, such as bettas, gouramis, and many blackwater species\u003c\/li\u003e\n\u003cli\u003eExcellent in breeding and shrimp tanks for the shelter it offers to fry and shrimplets\u003c\/li\u003e\n\u003cli\u003eUseful in planted and low-tech tanks as a nutrient sponge to help keep water clear\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tropica","offers":[{"title":"Default Title","offer_id":49445706006750,"sku":null,"price":14.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0645\/4768\/4574\/files\/2-38.png?v=1794688541","url":"https:\/\/poseidonaquaticsandplants.com\/products\/spirodela-polyrrhiza-tissue-culture-tropica","provider":"Poseidon Aquatics And Plants","version":"1.0","type":"link"}